fakesysdef ("system fix" variant) not detected by avast

Viruses and worms
1

I had the “System Fix” virus, a variant of the fakesysdef virus/trojan.
Why did avast not detect this virus?

I have run avast full time for years and not had a problem previously.

My guess is that it almost certainly came from a web page, not an email attachment.

I used Norton Power Eraser and Microsoft Standalone System Sweeper to get rid of it (I hope) after about 10 hours of chkdsk and other stuff.

I’d really rather not switch to Microsoft Security Essentials, but I think I might have to.

Thanks for any thoughts on how this problem might be averted in the future still using avast.

2

welcome to the forum.

is it this one?

http://www.bleepingcomputer.com/virus-removal/remove-system-fix

if so fallow the guide there on how to remove it.

good luck and let us know if you need further support.

3
Why did avast not detect this virus?
I'd really rather not switch to Microsoft Security Essentials, but I think I might have to.
there is no security program with 100% detection
4

These types of viruses,fake av’s,are repacked every 1-2 hours,so it’s really hard for AV’S to detect rogue av’s.