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Windows 7: Computer fails to boot after using Disk Cleanup.

31 Jan 2014   #1
dalewebster1993

Windows 7 Home Premium
 
 
Computer fails to boot after using Disk Cleanup.

Hey guys,

At the minute Windows 7 is completely failing to boot on my PC. I reach the Windows logo (with the loading animation) and it freezes after roughly half a second before restarting my computer. The machine also fails to boot into safe mode and recovery mode.

Before I rebooted my computer (which is when the problem arrived), I did two things. First I ran Disk Clean-Up to free up some space. In Disk Clean-Up I was able to free a lot of space by deleting temporary update files. After this, I unistalled AVG Antivirus in preparation to change to a different AV. During the uninstallation, my keyboard starting behaving strangely, and so when the installer asked if I wished to reboot I said yes. As my computer was shutting down, it displayed the 'Installing updates' message, but only very briefly. After that, my computer was unable to start.

I have two theories:
1. My computer was host to some sort of dormant virus (I don't actually know if this is a thing) that was activated once it detected my antivirus was gone. I don't know whether my keyboard behaviour was anomalous or a strange symptom of the infection. I ran the AVG rescue CD with a completely up to date definition library and it returned no results. I'm hoping someone can debunk this theory...

2. Running Disk Clean-up deleted files that were necessary for a scheduled update. When the update attempted to run, it failed due to the files missing, leaving my Windows installation in a broken state.

Personally, I think both are a bit far fetched; it would be crazy to be infected with a virus so quickly, and I can't imagine that Windows would let Disk Clean-Up erase such crucial files. But I have nothing else.

Does anyone have any thoughts or tests that I might be able to try?

Thanks


My System SpecsSystem Spec
.
31 Jan 2014   #2
Layback Bear

Windows 7 Pro. 64/SP-1
 
 

Two things come to mind.
1. Did you use the official AVG removal tool from their website?

2. You could run sfc /scannow to check Windows 7 files.
My System SpecsSystem Spec
31 Jan 2014   #3
dalewebster1993

Windows 7 Home Premium
 
 

Quote   Quote: Originally Posted by Layback Bear View Post
Two things come to mind.
1. Did you use the official AVG removal tool from their website?

2. You could run sfc /scannow to check Windows 7 files.

They have a removal tool? I just uninstalled it through the Control Panel. It was an AVG un-installer though.

What would be the best way to open the command prompt from outside of windows? I don't have a recovery disk. The computer that I'm using at the minute is running Windows 8.1, can I use this to create a recovery disk or not?
My System SpecsSystem Spec
.

31 Jan 2014   #4
archer

Windows 7 ultimate x64
 
 

Quote   Quote: Originally Posted by dalewebster1993 View Post
Quote   Quote: Originally Posted by Layback Bear View Post
Two things come to mind.
1. Did you use the official AVG removal tool from their website?

2. You could run sfc /scannow to check Windows 7 files.

They have a removal tool? I just uninstalled it through the Control Panel. It was an AVG un-installer though.

What would be the best way to open the command prompt from outside of windows? I don't have a recovery disk. The computer that I'm using at the minute is running Windows 8.1, can I use this to create a recovery disk or not?
Yes they have. Check out. http://www.avg.com/us-en/utilities
My System SpecsSystem Spec
31 Jan 2014   #5
dalewebster1993

Windows 7 Home Premium
 
 

Quote   Quote: Originally Posted by archer View Post

Yes they have. Check out. http://www.avg.com/us-en/utilities
Well I guess I'll check it out if I actually get back into my computer.

I was able to run command prompt from inside a windows 8 recovery disc. When I run sfc /scannow, it returns the message "Windows Resource Protection could not start the repair service".

I've googled around and seen that this has been discussed a lot, but I haven't seen a solution for it from outside of the windows installation.

Any thoughts? Maybe I should start a separate thread for this issue?

Thanks
My System SpecsSystem Spec
31 Jan 2014   #6
Sir George

Windows 7 Professional x64
 
 

Quote   Quote: Originally Posted by dalewebster1993 View Post
Quote   Quote: Originally Posted by archer View Post

Yes they have. Check out. http://www.avg.com/us-en/utilities
Well I guess I'll check it out if I actually get back into my computer.

I was able to run command prompt from inside a windows 8 recovery disc. When I run sfc /scannow, it returns the message "Windows Resource Protection could not start the repair service".

I've googled around and seen that this has been discussed a lot, but I haven't seen a solution for it from outside of the windows installation.

Any thoughts? Maybe I should start a separate thread for this issue?

Thanks
AVG should, the operative word being "should", uninstall using the add/remove programs listing for AVG. Their website has the following notice;

(quote)
AVG Remover eliminates all the parts of your AVG installation from your computer, including registry items, installation files, user files, etc. AVG Remover is the last option to be used in case the AVG uninstall / repair installation process has failed repeatedly.
(end quote)

I have underlined the significant part of the notice.

My personal approach is "Flea hunt with an elephant gun" and use the program providers uninstall utility, but it shouldn't be necessary most of the time.
My System SpecsSystem Spec
31 Jan 2014   #7
dalewebster1993

Windows 7 Home Premium
 
 

UPDATE

I managed to get hold of a Windows 7 recovery disk and ran the sfc scannow command again. This time the Resource Protection accepted the command, but it was halted with the message "There is a system repair pending which requires a reboot to complete. Restart Windows and run sfc again".

Obviously I can't restart Windows because I can't even boot into Windows.

Thanks
My System SpecsSystem Spec
01 Feb 2014   #8
gregrocker

 

Boot into System Recovery Options
to run System Restore to a point before the problem occurred.

Then run AVG uninstaller | Download tools and utilities.

Install Microsoft Security Essentials, update and run a full scan.

Also install Malwarebytes and SUPERAntiSpyware
free editions, decline trial during install, update and run full scans.

Check for Updates and install all Important and Optional Windows Updates, after hiding Bingware and IE11.

If any futher problems work through the Troubleshooting Steps for Windows 7
My System SpecsSystem Spec
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 Computer fails to boot after using Disk Cleanup.




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