When Windows won’t start
Your computer problems may not just be hardware related as Windows may easily “break” when a new program is installed or a system file becomes corrupted.If the computer starts fine but Windows fails to load, restart the computer and just after the Bios finishes loading, keep pressing the F8 key until the Windows Advanced Options menu appears.
The menu can only be navigated with cursor keys, so use the arrow keys on the keyboard to select Last Known Good Configuration.
If Windows starts up properly, remove any programs you installed or undo any changes you made recently.
If it still won’t start properly, reboot and go back to the Advanced Options menu again by pressing F8 and choose Safe Mode this time.
In Safe Mode, Windows will automatically skip loading programs and hardware components which in 99% of the cases should make it start. Don’t be shocked by the low resolution and how awful it looks. (continue at source).








