Hi ColinsAidoo,
· Have you made any changes on the computer prior to the issue?
· What is the complete and exact error message?
Follow the steps:
Step 1: Boot the computer in safe mode and check if the issue persists.
Start your computer in safe mode
http://windows.microsoft.com/en-US/windows7/Start-your-computer-in-safe-mode
Step 2: If the issue does not persist in safe mode, perform a Clean Boot to see if there is any software conflict as clean boot helps in eliminating software conflicts.
Note: After performing the troubleshooting steps in clean boot, follow Step 7 from the link to return the computer to Normal startup mode.