Hello. I've just registered here to report the same problem.
I'm a home user of Avast but a really careful one. *Really* careful about my internet and files.
I was playing a game using my wheel tonight when the auto update happened.
A short time after that i've got the report that wmjoyfrc.dll, located at windows\system32 was infected by a worm:
NetSky-BG
Man... i uninstalled my wheel (that .dll is used by the wheel, it is a Logitech Force Feedback something heh..) at once and then went nuts on the next two hours scanning my system using possible means.
Turned out pristine clean every time...
And then even after i downloaded the wheel driver again from Logitech, Avast would come and tell me it was infected again heh...
So yeah, i'm pretty sure it's not infected and that we need a fix for it, i"ll wait.
But in the mean time there's anything that i can do to "ignore" that and at least make use of my wheel again? Tomorrow is a holiday and i would like to play my racing games hehe!
Thanks for your time!
And i'm sorry about my poor english, i'm from Brazil.
Cheers.