Thx for your reply Bob,

Believe me, I’ve done it all! Event log, MSconfig, CCleaner, Revo Uninstaller, Safe mode, Process Monitor, Services.msc, MBAM, Dupefinder, cleaned Autostart, removing .tmp-files, Combofix, monitored task manager, Hijackthis, Spybot, Anti-Spyware, Ad-Aware, reinstallation, deleted all unnecessary files etc etc.
You name it, I’ve done it.

FYI I’ve even have several computers with Avast and all of them share the exact same symptoms.
And I’m not the type who clicks on suspicious links, surfs on suspicious sites, installs unknown applications/toolbars or use cracked software. I even use Mailwasher to bounce/delete emails from unknown senders. In other words I’m the careful kind, and very aware of the do’s and don’t’s in this digital era. I always keep my OS’s clean and to a minimum, just to be sure they are safe, stable and fast.

And btw as I said in the other thread that you referred from; -“Updating virus definitions, especially considering it’s incremental and I use my PC (Intel Core i7 2.67GHz, 16GB, Intel SSD 320) every day with my 100mbps broadband, can’t hardly be the only reason for Avast occupating all PC resources for several minutes at every log in.”

So thank you, but all this lagging only has one name; Avast! Nothing else!

But it goes to show that no software goes safe from becoming one of the bloaters.
And Avast managed to resist it for many many years, you gotta give them kudos for that:)