Using System Diagnostics
System Diagnostics allows you to run diagnostic tests to determine if the computer hardware is functioning properly.
To start System Diagnostics:
1.Turn on or restart the computer, quickly press esc, and then press f2.
2.Click the diagnostic test you want to run, and then follow the 
NOTE: If you need to stop a diagnostic test while it is running, press esc.
Using System Diagnostics 79