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Windows 10 start button not working after MalwareBytes scan


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#1 Christophe_F

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Posted 10 July 2016 - 12:59 PM

Hello

 

Since I installed MalwareBytes yesterday, my Windows 10 Start button doesn't work anymore.
It started after I ran a scan with MalwareBytes and rebooted my laptop (it found some threats that were deleted).
 

I've tried all the fixes that I could find but none of them worked for me:

- system file checker: found corrupt files but cannot fix it (tried it at least 5 times)

- checkdisk /f : no problems found

- Powershell: "Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register “$($_.InstallLocation)\AppXManifest.xml”}" > did not help

- no virusses were found with Avast, (ReimageRepair found 1 virus but I had to pay to get it fixed)

 

The big issue here is that I can't use the Windows repair options (and I don't know why).

I can go to the advanced settings (after holding shift while rebooting) and click on "Startup Repair" or "Command prompt" but while rebooting it always gets stuck in a black screen.

Same issue when I go to Settings, Recovery, "Reset this PC" (option to keep my files). While it's rebooting I can see the message "preparing..." but it's not doing anything after the message, I'm stuck at the black screen again.

 

I cannot reinstall Windows 10 neither, it says my C drive (SSD) is not compatible with EFI or UEFI because it needs to be GPT and not MBR. How did it ever get installed on my SSD if Windows says it's not compatible?

I hope someone can help me, I would prefer to fix the issue without having to do a clean install (which didn't even work last time I tried because of the problem with the MBR partition).

 

I did a scan with FRST, I hope this can help to resolve this issue.

Thanks in advance for the help!
 


Edited by Chris Cosgrove, 10 July 2016 - 04:12 PM.
Links deleted, reports not allowed in this section.


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#2 CKing123

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Posted 10 July 2016 - 03:27 PM

Hello Christophe_F and :welcome: to Bleeping Computer
 

- Powershell: "Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register “$($_.InstallLocation)\AppXManifest.xml”}"

Its a bug in Windows 10 and it doesn't work anymore in the November Update

- system file checker: found corrupt files but cannot fix it (tried it at least 5 times)

Can you attach the C:\Windows\logs\cbs\cbs.log in your next reply?

Note: if the file is too big to upload to your next post please upload via a service such as Dropbox or One Drive or SendSpace and just provide the link.

I cannot reinstall Windows 10 neither, it says my C drive (SSD) is not compatible with EFI or UEFI because it needs to be GPT and not MBR. How did it ever get installed on my SSD if Windows says it's not compatible?

We will fix this soon.

Since I installed MalwareBytes yesterday, my Windows 10 Start button doesn't work anymore.

Follow the instructions here: https://support.microsoft.com/en-us/help/12385/windows-10-troubleshoot-problems-opening-start-menu-cortana
 
-CKing


Edited by CKing123, 10 July 2016 - 03:38 PM.

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#3 Christophe_F

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Posted 10 July 2016 - 05:06 PM

Hi CKing123

Thanks for the welcome and for having a look into this issue.

I followed all the instructions from Microsoft but it did not help, I only got the confirmation with the troubleshooter that something is wrong with the apps:

> Check for updates: latest updates are installed (OK)
> Restart you device: rebooted my laptop a lot of times
> Start menu troubleshooter: found 1 problem "Required applications are not installed correctly" but the troubleshooter can't fix it.
> Create a new local administrator account: did not help (I also deleted my old admin account with no luck)
> Reset your PC (Recovery options in Windows 10) is not an option at the moment, repair or reset options do not work: it always hangs in black screen while booting


Here's a link for my CBS logfile (8MB):
https://www.sendspace.com/file/8z137s

Let me know if you need more information or logfiles.



#4 CKing123

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Posted 10 July 2016 - 05:16 PM

Thanks!

 

Can you go to your computer's BIOS? Just look for an option called Legacy Boot, BIOS COMPATIBILITY, or an option with a similar name. Don't change the option yet, just let me know if it is on or off. (Although it should be off, don't change it yet)

 

Edit: Also, the opencl.dll file that is corrupt as reported by SFC is nothing to worry about, because NVIDIA replaced it with their own copy

 

-CKing


Edited by CKing123, 10 July 2016 - 05:29 PM.

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#5 Christophe_F

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Posted 10 July 2016 - 05:45 PM

I just checked the BIOS.
There is no Legacy Boot option but I can see under "UEFI Setting" that "UEFI boot" is enabled, so I think this means the Legacy boot is disabled.



#6 CKing123

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Posted 10 July 2016 - 05:56 PM

I just checked the BIOS.
There is no Legacy Boot option but I can see under "UEFI Setting" that "UEFI boot" is enabled, so I think this means the Legacy boot is disabled.

Yes

 

Turn UEFI boot to off

 

Although you should be able to repair install, don't do this yet

 

I am searching up online to figure out a way to fix the Start Menu issues that you are having

 

-CKing


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#7 Christophe_F

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Posted 10 July 2016 - 06:13 PM

Hi CKing

 

Thanks for looking into it,
I tried to turn off UEFI boot but I cannot start Windows when it's off.
I get the following message "An operating System wasn't found. Try disconnecting any drives that don't contain an operating system".

It looks like it doesn't detect my SSD 128GB (C: drive with Windows) but my SATA 500GB harddrive (D drive with other data on it:)

 

I will not be able to answer in the next hours (it's past 1 in the morning here in Belgium), but I will be back tomorrow after work.
Thanks in advance for any new tips.



#8 CKing123

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Posted 10 July 2016 - 06:19 PM

Good night :)


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#9 Christophe_F

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Posted 11 July 2016 - 12:31 PM

Hello CKing

 

I don't know if you will be able to read my reply now (I think it's still morning where you guys are now).

 

About the UEFI boot mode vs legacy boot.
Do I need to turn off UEFI for further testing or investigation?

I found a possible solution for the fact that I cannot boot without the UEFI mode.

https://support.microsoft.com/en-us/kb/3103656

 

Let me know if this is something I need to try or if there is something else I can do.

Thanks.



#10 CKing123

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Posted 11 July 2016 - 01:11 PM

Although I am a bit busy, if you can't start your computer then turn on UEFI boot

-CKing

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#11 Christophe_F

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Posted 11 July 2016 - 01:27 PM

Hi CKing

 

My problem can wait a few more days don't worry.
I'm also quite busy, I know the feeling!

 

UEFI boot is turned on again but I guess it should boot with UEFI off to.

I will let you know if the instructions from Microsoft worked or not.
I'm not sure if I will be able to do it today (tonight) but I hope to have some time in the next 2 days.



#12 CKing123

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Posted 11 July 2016 - 03:32 PM

Well, UEFI boot should be off if you are using MBR, and on if you are using GPT

 

Please follow the instructions here on identifying if your disk is using GPT or MBR: http://www.howtogeek.com/245610/how-to-check-if-a-disk-uses-gpt-or-mbr-and-how-to-convert-between-the-two/

 

Ignore the part about converting because you will have to format the disk.

 

Let me know which one it is

 

Then, press Windows + X and choose Command Prompt (Admin)

In command prompt, copy and paste this command:

bcdedit >%UserProfile%\Desktop\info.log && notepad.exe %UserProfile%\Desktop\info.log

This will automatically open notepad with some information. If it doesn't, open info.log on your Desktop

Copy and paste the log in your next reply

 

-CKing


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#13 Christophe_F

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Posted 11 July 2016 - 03:58 PM

I just checked my 2 disks, both are MBR:

 

Disk 0 (SSD with 2 partitions)
-100MB + 111,69 GB with Windows (C:)

Disk 1
-465,76GB Data (D:)

 

 

This is the info I got in notepad:

 

Windows Boot Manager
--------------------
identifier              {bootmgr}
device                  partition=\Device\HarddiskVolume1
path                    \EFI\MICROSOFT\BOOT\BOOTMGFW.EFI
description             Windows Boot Manager
locale                  nl-NL
inherit                 {globalsettings}
default                 {current}
resumeobject            {5be687c5-e552-11e5-8c93-80fa5b25fb7b}
displayorder            {current}
toolsdisplayorder       {memdiag}
timeout                 30

Windows Boot Loader
-------------------
identifier              {current}
device                  partition=C:
path                    \Windows\system32\winload.efi
description             Windows 10
locale                  nl-NL
inherit                 {bootloadersettings}
recoverysequence        {5be687c7-e552-11e5-8c93-80fa5b25fb7b}
recoveryenabled         Yes
isolatedcontext         Yes
allowedinmemorysettings 0x15000075
osdevice                partition=C:
systemroot              \Windows
resumeobject            {5be687c5-e552-11e5-8c93-80fa5b25fb7b}
nx                      OptIn
bootmenupolicy          Standard
 



#14 CKing123

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Posted 11 July 2016 - 04:39 PM

That's definitely not right. Seems to me that you had GPT before, until something caused it to become MBR

 

Have you ever run this command?

bootrec /fixmbr

Anyways, make sure UEFI boot is enabled, and boot back into Windows 10 install disk

 

Press Shift + F10 when you are at the Install Windows screen

Command Prompt should open

Run these two commands

bcdedit /export C:\BCD.back
bcdboot c:\windows /l nl-NL /f BIOS

Restart your computer, and in the BIOS, turn UEFI boot to off, and see if you can load Windows

 

-CKing


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#15 FreeBooter

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Posted 11 July 2016 - 05:05 PM

Uninstall all third party antivirus and firewall programs and see issue get resolves if not you can do repair install of Windows 10 you will get to keep almost all your settings and installed programs and your personal files.

 

 

 

Repair Install Windows 10 with an In-place Upgrade

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