Crashing while scanning

Well, I ran updated versions of Spybot Search & Destroy and MalwareBytes, however my computer rebooted while both were scanning and it has kept happening every time I try and scan. Tried scanning with ComboFix but my computer restarted before ComboFix even tried to scan my computer.

Went into safe mode and MalwareBytes ran a Quick Scan successfully but found nothing and my comptuer crashed when I scanned with Spybot. ComboFix actually went through a few stages during its scan but my computer crashed...and it crashed again after ComboFix was preparing the log. I also ran RegCure and CCleaner during Safe Mode successfully and did 3 stages of chkdsk which deleted 3 index entries but my comp is still crashing.

Any suggestions?

Please note the text in blue listed above in this forum.

ComboFix is a tool that should only be run under the supervision of someone who has been trained in its use.

Install RootRepeal

Click here - Official Rootrepeal Site, and download RootRepeal.zip. I recommend downloading to your desktop.
Fatdcuk at Malwarebytes posted a comprehensive tutorial - Self Help guide can be found here if needed.: Malwarebytes Removal and Self Help Guides.
Click RootRepeal.exe to open the scanner.
Click the Report tab, now click on Scan. A Window will open asking what to include in the scan.
Check the following items:
Drivers
Files
Processes
SSDT
Stealth Objects
Hidden Services
Click OK
Scan your C Drive (Or your current system drive) and click OK. The scan will begin. This my take a moment, so please be patient. When the scan completes, click Save Report.
Name the log RootRepeal.txt and save it to your Documents folder - (Default folder).
Paste the log into your next reply.

Please note: If Rootrepeal fails to run, try this step: Click Settings - Options. Set the Disk Access slider to High

I did that and it froze on me...both in normal mode and in safe mode. It froze my whole computer as it was initializing for the scan.

Let's try an alternate

Please download Sophos Anti-rootkit & save it to your desktop.
alternate download link
Note: If using the vendor's download site you will be asked to register with MySophos so an email containing an activation link can be sent to your email address.

Be sure to print out and read the Sophos Anti-Rookit User Manual and Release Notes.

• Double-click sar_15_sfx.exe to begin the installation, read the license agreement and click Accept.
• Allow the default location of C:\Program Files\Sophos\Sophos Anti-Rootkit and click Install.
• A message will appear "Sophos Anti-Rootkit was successfully installed. Click 'yes' to start it now". Click Yes.
• Make sure the following are checked:
  • Running processes
  • Windows Registry
  • Local Hard Drives
• Click Start scan.
• Sophos Anti-Rootkit will scan the selected areas and display any suspicious files in the upper panel.
• When the scan is complete, a pop-up screen will appear with "Rootkit Scan Results". Click OK to continue.
• Click on the suspicious file to display more information about it in the lower panel which also includes whether the item is recommended for removal.
  • Files tagged as Removable: No are not marked for removal and cannot be removed.
  • Files tagged as Removable: Yes (clean up recommended) are marked for removal by default.
  • Files tagged as Removable: Yes (but clean up not recommended) are not marked for removal because Sophos did not recognize them. These files will require further investigation.
• Select only items recommended for removal, then click "Clean up checked items". You will be asked to confirm, click Yes.
• A pop up window will appear advising the cleanup will finish when you restart your computer. Click Restart Now.
• After reboot, a dialog box displays the files you selected for removal and the action taken.
• Click Empty list and then click Continue to re-scan your computer a second time to ensure everything was cleaned.
• When done, go to Start > Run and type or copy/paste: %temp%\sarscan.log
• This should open the log from the rootkit scan. Please post this log in your next reply. If you have a problem, you can find sarscan.log in C:\Documents and Settings\\Local Settings\Temp\.

Before performing an ARK scan it is recommended to do the following to ensure more accurate results and avoid common issues that may cause false detections.

• Disconnect from the Internet or physically unplug you Internet cable connection.
• Clean out your temporary files.
• Close all open programs, scheduling/updating tasks and background processes that might activate during the scan including the screensaver.
• Temporarily disable your anti-virus and real-time anti-spyware protection.
• After starting the scan, do not use the computer until the scan has completed.
• When finished, re-enable your anti-virus/anti-malware (or reboot) and then you can reconnect to the Internet.