Avast 7 locked my computer completely

After all my pain: updating Avast 7 over Avast 6, having to use aswclear, then after more travail, finally getting Avast 7 to work, I thought everything was cool. Nope. This afternoon, I locked totally. No application would run. After much more tooth gnashing and pain, I figured I’d try to use aswclear again and see whether I could use any other app without Avast on the machine. Understand, I hadn’t used Avast, I was just guessing.

So, I booted into safe mode - and was glad to be able to do that - and ran aswclear. Joy! It worked.

Then I booted back to regular Windows 7. Everything is back to normal. All clear; working fine.

If it’s any help, I’m running a Micro Express machine with a quadcore Intel i7 clocked at 3.4 GHz, 16 GB of main memory, 600 GB WD 10,000 rpm hard disk, and MS Win 7 X64.

I’m going to run without Avast for awhile. Let me know when it’s safe, again.

There is a tool for managing these situations forum.avast.com/index.php?topic=94514
Sorry to hear about your sad experiences. Come back if you need further help.

I'm going to run without Avast for awhile. Let me know when it's safe, again.
I certainly hope you're running something for protection. ???

you should try the avast almighty fix at this link:

http://forum.avast.com/index.php?topic=94514.0

bob3160, I’m running Microsoft Security Essentials, SUPERAntiSpyware, and Malwarebytes.

Now that Avast is gone, the only thing I’ve found that doesn’t work is Windows Defender. Trying to start it elicits Error Code: 0x80070424. As far as I can see, Windows Defender is gone completely. It certainly looks like Avast 7 caused some bad stuff on my machine.

Both Microsoft Security Essentials and Malwarebytes say the machine is clean. I also ran aswMBR which said that I have a suspect file called MpNWMon.sys. I don’t know what to do about that. I don’t have Avast on this machine at all so running a fix for it is pointless.

Mpnwmon.sys is a driver file from Microsoft Corporation belonging to Microsoft Malware Protection.

It appears that Malwarebytes detected and removed it as a Rogue.FakeMSE.
http://forums.malwarebytes.org/index.php?showtopic=53186

Wonder if that’s what killed your Windows Defender.

I have avast!7 free working without a hitch on both Windows 7 and Windows 8 (Developers Preview)

Malwarebytes detected MpNWMon.sys as a rogue infection sometime in 2010, not recently, and they fixed that problem right away.

It was aswMBR, an Avast production, that flagged MpNWMon yesterday on my machine.