BSOD caused by Trojan?

I've been getting some advice about causes of random BSOD we narrowed it down to HDD then I did a Virus Scan & a Trojan was picked up user Writhziden suggested I ask for help on this forum.

Hi, macca747.

Malwarebytes Anti-Malware 1.61.0.1400
Malwarebytes : Free anti-malware, anti-virus and spyware removal download

Database version: v2012.05.05.03

Windows 7 x64 NTFS
Internet Explorer 9.0.8112.16421
john :: JOHN-PC [administrator]

05/05/2012 11:53:16
mbam-log-2012-05-05 (12-00-13).txt

Scan type: Quick scan
Scan options enabled: Memory | Startup | Registry | File System | Heuristics/Extra | Heuristics/Shuriken | PUP | PUM
Scan options disabled: P2P
Objects scanned: 199087
Time elapsed: 6 minute(s), 22 second(s)

Memory Processes Detected: 0
(No malicious items detected)

Memory Modules Detected: 0
(No malicious items detected)

Registry Keys Detected: 1
HKCU\SOFTWARE\Microsoft\Internet Explorer\SearchScopes\{56256A51-B582-467e-B8D4-7786EDA79AE0} (Trojan.Vundo) -> No action taken.

Registry Values Detected: 0
(No malicious items detected)

Registry Data Items Detected: 0
(No malicious items detected)

Folders Detected: 0
(No malicious items detected)

Files Detected: 0
(No malicious items detected)

(end)

That is a rather old Vundo CLSID. Any reason why you didn't elect to remove it? Most frequently Vundo is a result of old/vulnerable versions of Java installed on the computer. Uninstall all Java versions except the most recent -- which should be Java SE Runtime Environment 7u4.

Scan with MBAM again:

• Launch Malwarebytes' Anti-Malware then click the Update tab and "Check for Updates
• Once the update has been installed and the program has loaded, select [b]Quick scan
• When the scan is complete, click OK, then Show Results to view the results.
• Be sure that everything is checked, EXCEPT items in System Restore as shown in this sample:
  
• Click Remove Selected.
• When disinfection is completed, a log will open in Notepad and you may be prompted to Restart. (See the Note below)
• The log is automatically saved by MBAM and can be viewed by clicking the Logs tab in MBAM.
• Please post contents of that file in your next reply.

** Note **

If MBAM encounters a file that is difficult to remove, you will be presented with 1 of 2 prompts. Click OK to either and let MBAM proceed with the disinfection process. If asked to restart the computer, please do so immediately.