I am having problems with my HP 530 (Windows XP) Laptop. Every time I boot up my laptop it comes up with "Non-system disk or disk error, replace and strike any key when ready".
It first appeared when my laptop fell, it wasn't high and I didn't believe it caused any major damage to the machine. So I waited for the machine to cool down and tried again, this time it worked fine.
The second time it was because I pulled an external hardware without asking to "Safely Remove" it and in turn caused a blue screen to pop up and then my computer crashed. When I turned on my computer the message popped up but my computer returned to normal when I let it cool down.
The third time it appeared is when my computer suddenly crashed, I think it was due to over-heating, and now my computer shows me the message every time I start up my computer even though it has been left for several hours.