On boot, horizontal blue lines. No startup.

[guppyfish]

Hi, apologies if i am posting in the wrong section, it is my first post.

I start up my computer, the bios runs as normal detecting drives etc. then it gets to "loading operating system..", from here it either stays that way or changes to a screen with horizontal blue lines and if you wait a little longer still, other colored lines appear aside these blue lines. This all happens at the top of the monitor.
I have tried to restart my PC several times and the same thing happens with these lines. I have also tried changing monitors, unplugging all inputs. Nothing.

IF there is any extra details you want, just ask.

What is the problem here, and what is the easiest way to fix it?

 

[marsmimar]

Hello guppyfish and welcome to Seven Forums.

When a computer fails to start it can be software related (perhaps a damaged or corrupt operating system) or hardware related (a failing hard drive, video card, etc.) Another posibility is the computer became infected with some kind of malware that has damaged or corrupted the boot files. It can be very time consuming to try to isolate the problem.

Can you boot your computer into Safe Mode by using Advanced Boot Options? If yes, you may be able to roll back your computer to a date/time before the problem began with a restore point.

http://www.sevenforums.com/tutorials/69585-safe-mode.html

http://www.sevenforums.com/tutorials/700-system-restore.html

If there are damaged or corrupt system files you may be able to repair them by running a system file checker scan from an elevated command prompt (option two.) If problems are found, run the scan 3 times and reboot your computer after each scan.

http://www.sevenforums.com/tutorials/1538-sfc-scannow-command-system-file-checker.html

If the problem continues, one of the Forum experts prepared this troubleshooting guide. Many people have been able to fix their computer issues by following the steps exactly.

http://www.sevenforums.com/tutorials/219533-troubleshooting-windows-7-failure-boot.html