Hi, this message usually is because the bios is looking for the wrong system storage location. in the bios there will be a choice of FLOPPY, CD, HARD DRIVE, NETWORK, for example as the message comes up when booting it could be that there is a cd set as 1st boot device and you have a different cd in the cddrive the bios looks at whats on the cd , then declares that it is a non system device or non system disk.
It looks like you could have either damaged your hard drive and then lost what is on it including the system files that are required to boot from. can you see in the bios if the harddrive is showing in the list.
Have you started an installation of windows and then stopped before allowing it to finish?
When starting the Notebook can you see on the screen display a list of the boot process?
This usually starts with a lot of numbers and then the search for drives, the drives are found the displayed and the boot process continues.
HP/Compaq method of testing for a hard drive is as follows:-
to Test your hard drive
Use the following steps to test your hard drive:
1. Restart the notebook PC.
2.When the HP or Compaq logo screen displays, press the F10 key repeatedly. The System BIOS Options Menu will appear.
3. When the System BIOS Options Menu is displayed, select Tools using the arrow keys.
4. Select Hard Drive Test.
The hard drive test will run a short test and a long test. The entire test may take 45 - 60 minutes to complete. To properly diagnose the hard drive, the entire test must be run.
Try the test and tell us what happens,
do not change anything in the bios without asking or finding out what could be right or wrong.