Avast won't scan.

[Dark Heart]

I do a scan about twice a week, with avast! home edition 4.8. I just tried to do my scan a few minutes ago and here is what happens:
1. The splash screen freezes when it is testing operating memory and startup items.
2. When I click stop memory scan (or something like that) it is still frozen.
3. I have to go under task manager and click "end task" and then avast! will start.

4. I try to start a scan, like always, but now it just sits there at 0%. It didn't start for 30min, so I tried to close Avast!, and it didn't close.
It eventually did, but very slow.

Last thing I did was manually remove AVG from registry and services, as I was told it was not wise to run it with avast!.

Now, before I resort to reinstall, I need to know what I am dealing with...If this is corruption, I can easily fix that; if it is a virus, then I am screwed.

OS: Vista Home Premium
RAM: 1gb
Manufacturer: Hewlett Packard/COMPAQ
PC age: about 14 months.
Type: Laptop

recent virus removals: WIN32Parite (PE.Parite.AO) - (October, 2007=date last seen)

Any Ideas, or should I reinstall.

[Lisandro]

Last thing I did was manually remove AVG from registry and services, as I was told it was not wise to run it with avast!

But did you uninstall AVG before removing manually that items?

[Dark Heart]

But did you uninstall AVG before removing manually that items?

When I tried to uninstall AVG from "Programs and features" it said AVG was already uninstalled. I didn't see any program files other than the AVG folder in the Program Files directory. But I still saw AVG in the services list in "Services", so I got rid of them through CMD. They were stopped btw.

I hardly believe that this is the cause, as it was done not-so-recently. I will re-boot first and then come back with the results.

[Lisandro]

I hardly believe that this is the cause

Maybe drivers... You can run Autoruns from Microsoft with elevated privileges and remove the AVG drivers entries...

I will re-boot first and then come back with the results.

Hope we could help further then...

[Dark Heart]

It was a registry issue, I tried to recover my registry with an incomplete backup .reg that I made and it messed it up, used System Restore to fix it. Thank you.