Windows 7 SP1 64 bit laptop wont boot after avast update. PLEASE HELP!

[REDACTED]

I have Win 7 Sp1 64bit laptop, and it won't boot up after avast updated itself. Boot hangs at aswRvrt.sys file. Can anyone help me?

In attachment I send FRST log.

[Eddy]

You need to ATTACH the log, not copy/paste it.

[REDACTED]

You need to ATTACH the log, not copy/paste it.

  Here's log attached.

[REDACTED]

I've uploaded in previous post FRST Log. Can anyone help me?

[essexboy]

Download the attached fixlist.txt to the same location as FRST
Start FRST and press fix
On completion try a normal boot

[REDACTED]

Will do. Afterwards I'll let you know if it worked.

[REDACTED]

Just tried. FRST did it's work, but it wasn' t enough to save Windows. Any other ideas that do not involwe reinstallation of OS?

[essexboy]

How many physical hard drives do you have

[REDACTED]

One, it's a laptop.

[Eddy]

Did you used the fixlist I gave you ?
If so, what happens if you try to boot now (both normal as well as in safe mode) ?
If you are getting a error, what is the exact error ?

[REDACTED]

Yeah, I've used the fixlist you gave me. I can't read the BSoD quick enough to se error message, damn thing just blinks and laptop resets.  When I try to boot into Safe Mode, booting hangs at \Windows\System32\Drivers\CLASSPNP.SYS

[Eddy]

That means your Windows installation is corrupt.
My advise it to install Windows from scratch.

Best is to do a clean installation with a Windows install cd/dvd.
You can use the recovery options for that laptop but it will likely also install things you don't need/want like McAcrap etc.

[REDACTED]

Just as I've feared. Don't wory about instalation of crap, I always do it without official "All(and junk too)-in-one" installers.


Still, I appreciate your help people a lot.

Thanks for helping.

[REDACTED]

One, it's a laptop.

It looks like from your FRST log there is other HDDs connected ?  ....maybe just some removable SD cards or something ?
Any chance you have upgraded HDD (eg. to SSD) and/or changed BIOS setting for HDD to AHCI from IDE ?
http://www.tomshardware.com/forum/254373-32-ahci-mode-only
I only mention because this CLASSPNP.SYS hang has been associated with this BIOS change.

You can disable auto restart by tapping F8 during startup or from inside windows if you switch back to IDE. The BSOD is probably 0x0000007B which points to an unreadable hard disk. If you did not install AHCI drivers during OS install you have to manually install them and edit the registry in order for the drive to be recognized in AHCI mode.

This may not be your issue but wanted to mention.