Dear Allan,
1)Sorry, I do not understand what "over-clocked" means. What does this mean?
2) This is HP Pavillion HPE h8t
3) Looked in the device manager, no there are no yellow or red symbols
4) I downloaded the memtest and burned to a cd as an .iso file. This is where I am stuck. I could not change the boot order. I had to call HP to help me find the BIOS utility. Once in BIOS, I did find the "Boot" prompt and the menu for boot priority there is called "boot order" and there were directions unlike in other BIOS menus. There were no choices of 1st boot device, 2nd boot device, etc. but there were prompts at the bottom F10 save, Enter- drag, F5 disable. Devices where "CD-ROM Devices", Hard Drive" and something else. I figured out how to palce CD-Rom Devices on top of "Hard drive" but the "Cd-Roms" are never on the very top because there is another option there, on the very top, that's not going away. I was able to move CD-ROMS up above the hard drive and I did "Save and Exit" in the File menu. At this moment the CD Rom was in the Drive F. Once I exited the BIOS, the machine still booted Windows 7, not the CD . I again restarted, entered BIOS and tried disabling "Hard Drive". Once I saved and exited, the machine said the "device was not found", or something to that effect and was not able to go any further. I had to restart, go into BIOS again and enabled the hard drive and logged on to Windows and am writing to you this message.
All this time the Disc is in the drive F
I am going to try to go back into BIOS so I can copy what options I have to describe them for you. later.
Sorry, this is getting too advanced for me at this point.
I am simply afraid of causing harm to the machine.