Several times a Windows 7 laptop would not boot without me pressing F2, when it would tell me "Media test failure, check cable", then proceed to boot up. If I pressed F12, the other alternative offered, it seemed to indicate it was trying to boot from a CD, but would not allow me to move cursor to use hdd.
Once booted up, it would not allow me, administrator, to log on by typing in password - until I had logged in as ordinary user first. Even then it would take ages to get beyond a black screen and cursor.
It would not allow me, in my account, to type in Word or Firefox until I had typed in another account first. Word told me I was trying to type with control key pressed - I wasn't. Web pages appeared in strange language - once one webpage - met office - completely resized
I created another admin account, which had no password, and which DID respond to keyboard.
What could be causing this change in behaviour? Is there any way I can fix it?