Note:

This problem was fixed with Service Pack 0, released in May 2012. Please check, if your Avira product is up to date and perform a product update if necessary.
In case this problem persists, please contact our support team referencing to article id: 1190.

If you have deactivated product updates and just manually triggered an update in your Avira 2012 product (Avira Free Antivirus, Avira Antivirus Premium 2012, Avira Internet Security 2012, Avira Professional Security), it might, in some rare cases, cause the possibility of updates being disabled and that Web Protection is not running anymore.

If you attempt to start an update within the Avira console, you will get an error message like “scheduler is not loaded”.

In case you have encountered this problem, we recommend you the following workaround:

Click on Start → All Programs → Accessoires → Command Prompt. Enter the following line:

Avira Professional Security

XP:
"C:\Program Files\Avira\AntiVir Desktop\update.exe" /productupdatemode=3 /DM="0"

Vista/Windows 7 (32-bit):
"C:\Program Files\Avira\AntiVir Desktop\update.exe" /productupdatemode=3 /DM="0"

Vista/Windows 7 (64-bit):
"C:\Program Files (x86)\Avira\AntiVir Desktop\update.exe" /productupdatemode=3 /DM="0"
 

Avira Free Antivirus, Avira Antivirus Premium 2012, Avira Internet Security 2012

XP:
"C:\Program Files\Avira\AntiVir Desktop\update.exe" /DM="0" /RECEIVETIMEOUT=120

Windows Vista/7 (32-bit):
"C:\Program Files\Avira\AntiVir Desktop\update.exe" /DM="0" /RECEIVETIMEOUT=120

Windows Vista/7 (64-bit):
"C:\Program Files (x86)\Avira\AntiVir Desktop\update.exe" /DM="0" /RECEIVETIMEOUT=120

Now your Avira product should be fully functional again.