HP dx2290 - Microtower PC Service & Reference Manual page 108

Table D-19 Solving Software Problems (continued)
Computer will not continue and no HP logo screen has appeared.
Cause
Computer will not continue after HP logo screen has appeared.
Cause
System files may be damaged.
"Illegal Operation has Occurred" error message is displayed.
Cause
Software being used is not Microsoft-certified for your version
of Windows.
Configuration files are corrupt.
100 Appendix D Troubleshooting Without Diagnostics
Solution
See the Restore Kit or the Worldwide Limited Warranty for
terms and conditions.
Solution
Restore the files from the Recovery Disc Set or backups you
created in HP Backup and Recovery Manager.
Solution
Verify that the software is certified by Microsoft for your version
of Windows (see program packaging for this information).
If possible, save all data, close all programs, and restart the
computer.