Windows 10: Can't boot to Windows 10 after uninstalling Avast antivirus.

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  1.    17 Jan 2016 #11

    I ran chkdsk but still no resolution.
    I also ran farbar per another forums suggestion.
    C:\Windows\System32\Drivers\volsnap.sys IS MISSING <==== ATTENTION
    C:\Windows\System32\codeintegrity\Bootcat.cache IS MISSING <==== ATTENTION
    being the root of my problem and from microsoft support bootcat.cache needs to be deleted.
    how would i go about doing that in command prompt?


    edit: after navigating to C:\ cd windows\system32\codeintegrity
    "del bootcat.cache" bootcat.cache could not be found.


    any solution besides factory reset?
    Last edited by socksnatcher; 17 Jan 2016 at 18:10.
      My ComputerSystem Spec

  2. axe0's Avatar
    Posts : 13,720
    Windows 10 Pro
       18 Jan 2016 #12

    An inplace upgrade might help, keeps your files and stuff and only removes the updates from Windows Update.
    Repair Install Windows 10 with an In-place Upgrade - Windows 10 Forums
      My ComputersSystem Spec

  3.    18 Jan 2016 #13

    axe0 said: View Post
    An inplace upgrade might help, keeps your files and stuff and only removes the updates from Windows Update.
    Repair Install Windows 10 with an In-place Upgrade - Windows 10 Forums

    tried it but it hangs @ 1% and then shows that the task could not be finished. most likely at this point ill back up my files via cmd/notepad and do a factory reset. thanks all for your help
      My ComputerSystem Spec

  4.    09 Mar 2017 #14

    I know this is an old thread but for anyone with similar problems one possibility is that Avast may have quarantined some files required for booting, possibly because of a virus at some time. When you uninstalled Avast, it removed the quarantine files as well. If simpler approaches fail, in the Advanced Boot menu, try a Startup Repair.
      My ComputerSystem Spec

  5.    08 Apr 2017 #15

    I am having this very same issure
      My ComputerSystem Spec

  6.    10 Aug 2017 #16

    Hi. I uninstalled Avast, Installed AVG, ordered the computer to restart, and now it cannot boot. None of the Windows 10 recovery options work. I'm now on the Windows PE found in this thread:
    Windows 10 Recovery Tools - Bootable Rescue Disk - Windows 10 Forums

    I did a scan using FRST. Here are the results:

    FRST.txt

    It's definitely one of the antivirus programs. Judging from what people are saying on the Internet, it's probably the uninstalling of Avast that did it. If I can find the specific corrupted or missing files and restore them without having to reinstall Windows that would be great. (I didn't make a recovery disk and now that I can't boot I don't know if it's possible to run the media creation tool from Windows PE). Any help would be greatly appreciated!
    Last edited by daarklord; 10 Aug 2017 at 02:32.
      My ComputerSystem Spec

  7.    10 Aug 2017 #17

    daarklord said: View Post
    Hi. I uninstalled Avast, Installed AVG, ordered the computer to restart, and now it cannot boot. None of the Windows 10 recovery options work. I'm now on the Windows PE found in this thread:
    Windows 10 Recovery Tools - Bootable Rescue Disk - Windows 10 Forums

    I did a scan using FRST. Here are the results:

    FRST.txt

    It's definitely one of the antivirus programs. Judging from what people are saying on the Internet, it's probably the uninstalling of Avast that did it. If I can find the specific corrupted or missing files and restore them without having to reinstall Windows that would be great. (I didn't make a recovery disk and now that I can't boot I don't know if it's possible to run the media creation tool from Windows PE). Any help would be greatly appreciated!
    Hi daarklord and welcome to Tenforums.

    Have a look at this thread:
    bsod - Is there any solution to Process1_Initialization_Failed on Windows 7? - Super User

    Perhaps this will help:

    Click image for larger version. 

Name:	image.png 
Views:	43 
Size:	14.7 KB 
ID:	148185

    Or, the answer by Derek McNelly.

    Click image for larger version. 

Name:	image.png 
Views:	43 
Size:	39.0 KB 
ID:	148184

    I realize this refers to W7, but the process would be the same. Not sure if you want to go through this much effort though. A repair install might be best.

    AVs get so deep into the system that, when they mess something up, they mess it up big time. Again, a repair install is probably best.
      My ComputerSystem Spec

  8.    12 Aug 2017 #18

    simrick said: View Post
    Hi daarklord and welcome to Tenforums.

    Have a look at this thread:
    bsod - Is there any solution to Process1_Initialization_Failed on Windows 7? - Super User

    Perhaps this will help:

    Click image for larger version. 

Name:	image.png 
Views:	43 
Size:	14.7 KB 
ID:	148185

    Or, the answer by Derek McNelly.

    Click image for larger version. 

Name:	image.png 
Views:	43 
Size:	39.0 KB 
ID:	148184

    I realize this refers to W7, but the process would be the same. Not sure if you want to go through this much effort though. A repair install might be best.

    AVs get so deep into the system that, when they mess something up, they mess it up big time. Again, a repair install is probably best.
    Thanks simrick. I went with a complete reinstall after all. My IT expert friend said a repair install is just like a reinstall but you get an auto-generated HTML page that lists what programs were removed and have to be reinstalled, which isn't all the much better. Same in your experience? Either way here I am with a noticeably faster new Windows 10, reinstalling my drivers.

    I'm going to stick with Windows Defender for now. Suffering from PTSD about installing an anti-virus.
      My ComputerSystem Spec

  9.    13 Aug 2017 #19

    daarklord said: View Post
    Thanks simrick. I went with a complete reinstall after all. My IT expert friend said a repair install is just like a reinstall but you get an auto-generated HTML page that lists what programs were removed and have to be reinstalled, which isn't all the much better. Same in your experience? Either way here I am with a noticeably faster new Windows 10, reinstalling my drivers.

    I'm going to stick with Windows Defender for now. Suffering from PTSD about installing an anti-virus.
    Hi,
    A RESET will get you a list of removed programs. A Repair Install is different, and maintains your programs.
    But, you're good with a clean install, so glad all is well. Cheers.
      My ComputerSystem Spec

  10.    18 Aug 2017 #20

    I will be brief. Understanding this is an old thread. Avast caused nothing but problems for me. I wrote Avast. As usual, "It's not us so it must be you". Between blocking and blocking sites and programs, causing Start up problems galore, repeatedly stopping the stream in a room as I entered .... I'd had it. Uninstalled it. After 3rd uninstall the WD 1TB (less than a year old) would not boot into Windows. Wouldn't let me re-install Windows. Made the whole drive useless. If I were you right now, I'd do what I finally did. Get MalwareBytes and thank God you won't have to deal with Avast again.
      My ComputerSystem Spec


 
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