Windows 10 will not boot after Avast Free update

[REDACTED]

I have two  pcs running Windows 10.   After the latest update  I was alerted that I needed to reboot the machine.   The PC hangs at the rotating dots screen.   I was able to use a restore point to get the PC running  but would like to know if there is a fix for the problem.

[bob3160]

I have two  pcs running Windows 10.   After the latest update  I was alerted that I needed to reboot the machine.   The PC hangs at the rotating dots screen.   I was able to use a restore point to get the PC running  but would like to know if there is a fix for the problem.

I suggest that you do a clean install of Avast. Especially now that you've used a restore point.

Clean Install of Avast:
https://goo.gl/4Ptzkf

[REDACTED]

I have already tried that.   Even a clean install results in a failure to boot.

[Pondus]

see here  >>  https://forum.avast.com/index.php?topic=53253.0
Scroll down to second picture ... Farbar Reccovery Scan Tool ... run as instructed and attach the two diagnostic logs


See below the box you write in ... Attachments and other options


and in case you wonder, No we do not think you have malware, the tool above is a diagnostic tool

[REDACTED]

Here are the files

[essexboy]

It looks as though the update did not complete.  So lets go for a fresh install after this FRST fix

 CAUTION :  This fix is only valid for this specific machine, using it on another may break your computer

Open notepad and copy/paste the text in the quotebox below into it:
 

CreateRestorePoint:
2016-03-16 15:29 - 2016-03-14 18:53 - 01059656 _____ (AVAST Software) C:\WINDOWS\system32\Drivers\asw3FB9.tmp
2016-03-16 15:29 - 2016-03-14 18:53 - 00449992 _____ (AVAST Software) C:\WINDOWS\system32\Drivers\asw46D2.tmp
2016-03-16 15:29 - 2015-08-26 19:32 - 00274808 _____ (AVAST Software) C:\WINDOWS\system32\Drivers\asw4731.tmp
2016-03-16 15:29 - 2015-08-26 19:32 - 00150672 _____ (AVAST Software) C:\WINDOWS\system32\Drivers\asw47AF.tmp
2016-03-16 15:29 - 2015-08-26 19:32 - 00093528 _____ (AVAST Software) C:\WINDOWS\system32\Drivers\asw4596.tmp
2016-03-16 15:29 - 2015-08-26 19:32 - 00090968 _____ (AVAST Software) C:\WINDOWS\system32\Drivers\asw4673.tmp
2016-03-16 15:29 - 2015-08-26 19:32 - 00065224 _____ (AVAST Software) C:\WINDOWS\system32\Drivers\asw46B2.tmp
2016-03-16 15:29 - 2015-08-26 19:32 - 00028656 _____ (AVAST Software) C:\WINDOWS\system32\Drivers\asw4624.tmp
2016-03-14 18:52 - 2016-02-09 15:13 - 01059656 _____ (AVAST Software) C:\WINDOWS\system32\Drivers\aswCB77.tmp
2016-03-14 18:52 - 2016-02-09 15:13 - 00449992 _____ (AVAST Software) C:\WINDOWS\system32\Drivers\aswCB9C.tmp
2016-03-14 18:52 - 2015-08-26 19:32 - 00274808 _____ (AVAST Software) C:\WINDOWS\system32\Drivers\aswCBAC.tmp
2016-03-14 18:52 - 2015-08-26 19:32 - 00150672 _____ (AVAST Software) C:\WINDOWS\system32\Drivers\aswCBAD.tmp
2016-03-14 18:52 - 2015-08-26 19:32 - 00093528 _____ (AVAST Software) C:\WINDOWS\system32\Drivers\aswCB88.tmp
2016-03-14 18:52 - 2015-08-26 19:32 - 00090968 _____ (AVAST Software) C:\WINDOWS\system32\Drivers\aswCB9A.tmp
2016-03-14 18:52 - 2015-08-26 19:32 - 00065224 _____ (AVAST Software) C:\WINDOWS\system32\Drivers\aswCB9B.tmp
2016-03-14 18:52 - 2015-08-26 19:32 - 00028656 _____ (AVAST Software) C:\WINDOWS\system32\Drivers\aswCB89.tmp
EmptyTemp:
CMD: bitsadmin /reset /allusers

 
Save this as fixlist.txt, in the same location as FRST.exe

Run FRST and press Fix
On completion a log will be generated please post that

THEN

Download Avast Uninstall Utility to your Desktop.
Download the correct version of Avast 
Avast Free
Avast Pro
Avast Internet Security
Avast Premier
Disconnect from the net
Uninstall Avast via control panel

• Run the uninstall tool and accept the reboot to safe mode
• Once complete reboot your system
• Reinstall Avast

----------

[REDACTED]

NO JOY

All procedures above performed.   On reinstall, PC froze at end of install and had to be hard restarted.  Avast free was not fulkly installed.   Went to control panel and attempted repair.  Repair completed but on restart windows would not start.   Had to use a restore point to get PC operating again.  Where do I go from here?

[essexboy]

Could you temporarily disable cryptoprevent and see if that is blocking the temp files area

[REDACTED]

Uninstalled cryptoprevent.   NO JOY,   Installation completed but windows would not start on reboot.   Repaired using restore point.

[essexboy]

Hmm not sure what can be causing this as I experience no problems with 10 Would you be prepared to disable MBAM anti exploit next

[REDACTED]

Trying that now.   Will report

[REDACTED]

No Joy on all attempts.   I finally got tit to finish the install but system hung at boot.

[REDACTED]

Will it boot into Safe Mode ?
http://www.digitalcitizen.life/4-ways-boot-safe-mode-windows-10
...probably need to use USB RE (https://www.microsoft.com/en-us/software-download/windows10  ......scroll down to use the media creation tool below to create your own installation media with either a USB ).

I'd boot into Safe Mode and then setup Clean Boot
http://winaero.com/blog/how-to-perform-a-clean-boot-of-windows-10-to-diagnose-issues/
Reboot and see if Windows comes up.........if so, then start clicking on items one by one in MSCONFIG and reboot to see the conflict/culprit.
Something being loaded of course............maybe Classic Shell (just example) ?

[essexboy]

Thanks, this at the moment appears to be one of the unknowns...  I will have a rummage around to see if I can find some commonality

[REDACTED]

Yes, I will probably have to go through 1 by 1,   The trouble is that it takes so much time once it hangs and I have to do a restore point.  Yes, I can boot the PC in safe mode after a hang.   I have tried installing from safe mode but it still hangs on normal boot.     Thanks for your help.   I will post if I find anything out.   BTW I have Classic Shell running on other Win 10 machines and it does not cause a problem.   On another note, the second machine must have been a minor glitch as I was able to get it to boot after the update.   I am trying to get out of town for the Spring break so I will be putting this on hold til later.