I meant the exact error, which should include a bit more info and a code. That said, from what you mentioned, the following should help.
First I would suggest checking for system file corruption and also Hard Drive/HDD corruption. In Windows open "Command Prompt" as Administrator and then, when it loads, type in "chkdsk /f /r" (without the quotes). Hit "Enter" and then type "Y" (again without quotes). Now restart the computer and it should perform a check of the disk. Once it has completed and you are back in Windows, again load the "Command Prompt" as Administrator and then type in "sfc /scannow" (no quotes). Hit "Enter" and wait for it to check for any file issues.
Should that find nothing, then run "Windows Update" and install any...