Well, haven't you, by a chance, disabled the avast self-protection in avast settings?
I don't remember doing that but... can't rule that out at the moment and it's too late to check - reinstalled 4.8 from scratch (will check it in a moment on new install anyway). But what I noticed now is that standard Start value for aswSP = 1 and not 2.
BTW the aswSP.sys versions (patches) are experimental, and as such, they miss certain parts of functionality. E.g. version #2 misses the registry key protection and so on...
Heh, that would explain it, and of course I thought I somehow broken my Avast install or somesuch.
Well, better safe than sorry, hence reinstall.
EDIT: Nevermind me with the files not being protected, nothing such happens after reinstall, I did mess something up with it in settings probably.
Anyway, testing again - file 1 after ~5 minutes still shows no lag, even though standard 4.8 lagged for me instantly on login screen. This will require longer testing that it seemed, but I can tell already that even file nr 1 makes lags much more rare than standard 4.8 for me, even though lag still shown at times on first test. File nr 2 - to be tested tomorrow for longer (so far nor lags), I am too tired now.