Why Is My Computer Restarting After The Windows 7 Logo Appears

I don’t have any backup disc or system restore image. I have tried repairing with the installation disc but it doesn’t work. Windows is not able to solve it.

I have also tried memory check options. No errors were found.

The system also doesn’t start in Safe Mode. I tried viewing the contents of the Hard Drive with other OS. All the data is present in it.

I have also tried Disabling the Automatic Restart option and got a error:

STOP: c000021a {Fatal System Error}

The windows subsystem process terminated unexpectedly with a status of 0xc0000005 (0x74e5ae04 0x0099e5d4).

The system has been shut down.

Kindly suggest some solutions. I don’t want to format and reinstall everything!!