There is a workaround until they fix it, at least they say its one (i tried to translate it):
1. disable auto-update
2. Goto Common->Security (make sure expert mode is on)
3. Rename "C:\WINDOWS\system32\drivers\avipbb.sys" to avipbb.sys.bak"
4. Reboot and reactivate (2.)
I can't try it yet (or at least for 1 hour
I'm playing Sims 2 Seasons, and since there seem to be problems since the last Avira Patch (developer enviroments have most problems) I think it is the source, it would also explain why it worked yesterday.
My problem does not refer to SC4 but another EA game. But since this is the ONLY topic i found witch matches the error message i think i can narrow the problem after some research via google.
So my question (and hope): Does anyone of you with that problem use Avira?