Important: Your current Windows version is outdated and no longer supported.
For your security, we recommend switching to Windows 10 or Windows 11 before downloading Avira software.
Update your Windows version here.
Our Avira Phantom VPN is no longer available for use within India as a result of governmental regulations requiring the logging and saving of user data, but you can still use your subscription when traveling outside of India.
Skip to Main Content

Virus

What is a virus?

Computer viruses are self-reproducing malicious software that wreak havoc on devices and spread from one file to another, then one device to another, frequently via email attachments, drive-by-downloads, and USB drives. Viruses need human action to spread.


What they are after

Most viruses attach themselves to executable files, but on occasion, they also affect MS Office macros, auto-run scripts, and the master boot record. Viruses are largely disruptive in nature: they display irritating messages, disrupt the functioning of a device, corrupt files, or delete them altogether. In certain cases, viruses can also steal information.


Known cases

  • The Concept Virus that was accidentally shipped on a CD-ROM by Microsoft in 1995.
  • Chernobyl virus used to strike every year on April 26, marking the anniversary of the Chernobyl nuclear accident.
  • The Melissa virus, which spread via email and allegedly caused $80 million in damage.

How to block viruses

Computer virus protectionAvira Free Antivirus protects you from viruses.

Automatically renews, unless the renewal is cancelled. Price subject to change.
Subscription details below.*
Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Subscription details below.*
Automatically renews, unless the renewal is cancelled. Subscription details below.*
Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Subscription details below.*
Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Subscription details below.*
Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Subscription details below.*
Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Subscription details below.*
Special offer for the 1st #cma_period# until #cma_promo_end_date#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Subscription details below.*
Special offer for the first #cma_period# until #cma_promo_end_date#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Subscription details below.*
Special offer for the 1st #cma_period# until #cma_promo_end_date#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Subscription details below.*
Special offer until #cma_promo_end_date#: #cma_promo_price# — #cma_promo_saved_price# off the 1st #cma_period# price of #cma_promo_standard_price#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Subscription details below.*
Special offer until #cma_promo_end_date#: #cma_promo_price# — #cma_promo_saved_price# off the first 2 year price of #cma_promo_standard_price#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Subscription details below.*
Special offer until #cma_promo_end_date#: #cma_promo_price# — #cma_promo_saved_price# off the 1st #cma_period# price of #cma_promo_standard_price#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Subscription details below.*
Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Subscription details below.*
Special offer until #cma_promo_end_date#: #cma_promo_price# — #cma_promo_saved_price# off the 1st #cma_period# price of #cma_promo_standard_price#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Subscription details below.*
Special offer until #cma_promo_end_date#: #cma_promo_price# — #cma_promo_saved_price# off the first 2 year price of #cma_promo_standard_price#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Subscription details below.*
Special offer until #cma_promo_end_date#: #cma_promo_price# — #cma_promo_saved_price# off the 1st #cma_period# price of #cma_promo_standard_price#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Subscription details below.*
Payment method required. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Offer details below.*
Payment method required. When trial ends: paid subscription starts at #cma_promo_price# / first #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Offer details below.*
Payment method required. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Offer details below.*
Payment method required. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period# (#cma_promo_saved_price# off the 1st #cma_period# price of #cma_promo_standard_price#), and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Offer details below.*
Payment method required. When trial ends: paid subscription starts at #cma_promo_price# / first #cma_period# (#cma_promo_saved_price# off the first 2 year price of #cma_promo_standard_price#), and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Offer details below.*
Payment method required. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period# (#cma_promo_saved_price# off the 1st #cma_period# price of #cma_promo_standard_price#), and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Offer details below.*
Payment method required. Special offer for the 1st #cma_period# until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Offer details below.*
Payment method required. Special offer for the first #cma_period# until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / first #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Offer details below.*
Payment method required. Special offer for the 1st #cma_period# until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Offer details below.*
Payment method required. Special offer until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period# (#cma_promo_saved_price# off the 1st #cma_period# price of #cma_promo_standard_price#), and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Offer details below.*
Payment method required. Special offer until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / first #cma_period# (#cma_promo_saved_price# off the first 2 year price of #cma_promo_standard_price#), and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Offer details below.*
Payment method required. Special offer until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period# (#cma_promo_saved_price# off the 1st #cma_period# price of #cma_promo_standard_price#), and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Offer details below.*
Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Savings compared to the renewal price. Subscription details below.*
Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Savings compared to 2 x annual renewal price of #cma_promo_renewal_price# / year. Subscription details below.*
Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Savings compared to the renewal price. Subscription details below.*
Special offer for the 1st #cma_period# until #cma_promo_end_date#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Subscription details below.*
Special offer for the first #cma_period# until #cma_promo_end_date#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Subscription details below.*
Special offer for the 1st #cma_period# until #cma_promo_end_date#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Subscription details below.*
Special offer until #cma_promo_end_date#: #cma_promo_price# — #cma_promo_saved_price# off the 1st #cma_period# price of #cma_promo_standard_price#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Savings compared to the renewal price. Subscription details below.*
Special offer until #cma_promo_end_date#: #cma_promo_price# — #cma_promo_saved_price# off the first 2 year price of #cma_promo_standard_price#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Savings compared to 2 x annual renewal price of #cma_promo_renewal_price# / year. Subscription details below.*
Special offer until #cma_promo_end_date#: #cma_promo_price# — #cma_promo_saved_price# off the 1st #cma_period# price of #cma_promo_standard_price#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Savings compared to the renewal price. Subscription details below.*
Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Savings compared to the renewal price. Subscription details below.*
Special offer for the 1st #cma_period# until #cma_promo_end_date#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Subscription details below.*
Special offer for the first #cma_period# until #cma_promo_end_date#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Subscription details below.*
Special offer for the 1st #cma_period# until #cma_promo_end_date#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Subscription details below.*
Payment method required. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.*
Payment method required. When trial ends: paid subscription starts at #cma_promo_price# / first #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.*
Payment method required. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.*
Payment method required. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.*
Payment method required. When trial ends: paid subscription starts at #cma_promo_price# / first #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.*
Payment method required. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.*
Payment method required. Special offer for the 1st #cma_period# until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period# and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.*
Payment method required. Special offer for the first #cma_period# until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / first #cma_period# and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.*
Payment method required. Special offer for the 1st #cma_period# until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period# and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.*
Payment method required. Special offer until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.*
Payment method required. Special offer until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / first #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.*
Payment method required. Special offer until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.*
Payment method required. When trial ends: paid subscription starts and automatically renews, unless the renewal is cancelled. Price subject to change.
Offer details below.*
#cma_promo_price# — #cma_promo_saved_price# off the 1st #cma_period# price of #cma_promo_standard_price#. Then #cma_promo_renewal_price# / #cma_renewal_period#.
#cma_promo_price# — #cma_promo_saved_price# off the first 2 year price of #cma_promo_standard_price#. Then #cma_promo_renewal_price# / #cma_renewal_period#.
#cma_promo_price# — #cma_promo_saved_price# off the 1st #cma_period# price of #cma_promo_standard_price#. Then #cma_promo_renewal_price# / #cma_renewal_period#.
The remaining value left on your current subscription is converted into additional days in your new subscription.
Big savings. Strong online security: 43% off Avira Prime >
Riesen Rabatt. Starke Online-Sicherheit: 43% auf Avira Prime >