[Blue Screen] Windows 7 Professional - Unknown Bugcheck: Bugcheck 50

Hi I need help. My PC was working just fine before I shut it down to go out with friends. When I got home it suddenly got a blue screen and it ran Startup Repair. This is a shortened version of what came out: (I only copied what seemed to be relevant) 

Startup Repair cannot repair this computer automatically

Problem Signature:

Problem Event Name:      StartupRepairOffline

Problem Signature 01:     6.1.7600.16385

Problem Signature 02:     6.1.7600.16385

Problem Signature 03:     unknown

Problem Signature 04:     21200291

Problem Signature 05:     AutoFailover

Problem Signature 06:     3

Problem Signature 07:     0x50

OS Version:                        6.1.7601.

Locale ID:                           1033

Diagnosis and repair details:

Startup Repair diagnosis and repair log

Last successful boot time: 1/3/2013   7:11:26 AM (GMT)

Number of repair attempts: 3

Session details

System Disk = \Device\Harddisk0

Windows directory = C:\Windows

AutoChk Run = 0

Number of root causes = 1

Root cause found:

Unknown Bugcheck: Bugcheck 50. Parameters = 0xfffff880009aafb8, 0x0, 0xfffff8000347bc60, 0x0.

Repair action: System Restore

Result: Failed. Error code = 0x490

Time taken = 0 ms

Repair action: System files integrity check and repair

Result: Failed. Error code = 0x490

Time taken = 447302 ms

Please help! :(


Question Info

Last updated June 16, 2019 Views 1,777 Applies to:


Thank you for posting the query in Microsoft community!
From the problem description I understand that, you receive error Blue Screen on the computer.

Did you make any changes on the computer prior to the issue?

You may try the steps from the knowledge base article and check if it helps:

Warning: Microsoft does not recommend interrupting the CHKDSK process. Microsoft does not guarantee the integrity of the disk if the CHKDSK program is interrupted. For safety you can back up your data before using the check disk command.

If you need further assistance, please reply and we will be happy to help you.

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