Blue Screen issue, System crashes randomly and automatically rebooting

Hello Uuganbat and welcome to Sevenforums.

.exeplorer troubleshooting

• Having crashes upon the .explorer usually reveals problems in the Windows Context Menu. I'd suggest you to download a software called ShellExView. The idea of ShellExView is to figure out, what shell extension is causing your explorer to crash.
  
  • Use the software with this procedure- Disable one extension that doesn't belong to Microsoft. In many cases there are running 3rd party shell extension along Windows, and may cause the crash. If the crash persist, undo the selection, and proceed to the next non-Microsoft extension. Keep doing so, until you've found the culprit.
  
  
• Download Malwarebytes. Malwarebytes will investigate malware and worm targets, and try to remove them. It's very handy in that manner.
  
  • Run a full scan of it twice or more. In many cases it won't detect malware in the first shot.
  
  
• To ensure Windows isn't broken, we'll recommend the sfc /scannow command.
  
  • Here's how- Press Start | search 'cmd' | Right-click it
    | open as Admin | type SFC /SCANNOW
    
    SFC /scannow
  
  
• If the steps didn't work, Create a new User Account on your system. The current user account you're using, may be broken and corrupted.

Best Regards,
Frederik.