Back your information, if conceivable. In the event that you can boot into Safe Mode. Accept the open door to reinforcement as quite a bit of your significant records and information as possible. You can back up your records to an outside hard drive or blaze drive. In the event that you can boot into Safe Mode with Networking, you can back up your information to a distributed storage administration, as iCloud, DropBox,or Google Drive. 

Reinstall your working framework. On the off chance that you can boot into Safe Mode, the issue is doubtlessly a product issue. You may need to reinstall your working framework. Utilize the accompanying strides to reinstall your working framework from Safe Mode: 

Windows: 

Snap the Windows Start menu symbol. 

Snap the Gear/Settings symbol. 

Snap Update and Security. 

Snap Recovery in the board to one side. 

Snap Get Started beneath "Reset this PC". 

Snap Keep my records or Remove everything. 

Snap Next. 

Adhere to the guidelines and snap Reset. 

Macintosh: 

Ensure your Time Machine circle drive is associated. 

Restart your Mac and hold "Order + R" as your Mac boots up. 

Select your language and snap the bolt symbol. 

Snap Reinstall macOS (If you need to wipe your hard drive, click Disk Utility and select your hard drive. At that point click Erase.) 

Enter your username and secret key, if necessary. 

Snap Continue. 

Supplant or fix your PC. On the off chance that you've taken a stab at everything and your PC won't control on or boot up, you presumably need to have your PC fixed or supplanted. In the event that you have a more seasoned PC, it might be less expensive to purchase another PC instead of have it fixed. Else, you can take it to a PC auto shop to have it fixed. In the event that your PC is as yet under guarantee, contact the maker or retail location to perceive what you have to do to have your PC fixed or supplanted.