HP Compaq Presario,Presario 8380 Supplementary Manual page 16

A "Non-System Disk" error occurred.
If you have a diskette in the drive, remove the
diskette, and then press any key to continue.
I need more space on my hard disk.
Run a hard disk space check to find out exactly
how much space you have. See "Using System
Tools" on page 4.
You can defragment your hard disk. That is, you
can rearrange your current files so that they are
packed in together and any little storage spaces
between them are removed to make empty space
on the hard disk. Results will vary. See "Using
System Tools" on page 4.
12
Getting Help
My computer is taking longer to start up than it
did before.
Before turning off the computer, make sure there
isn't a CD in the drive, so that the computer won't
have to spend time checking it the next time you
turn on the system.
You don't have to wait for the virus scan each
time. Press the Spacebar to skip the scan. (Don't
skip it all of the time; you should run a virus scan
occasionally.)
Your disk may need to be defragmented. See
"Using System Tools" on page 4.