I have a 17.3" Hp Pavilion dv9-9723cl laptop w/Vista, 4GB of ram and a AMD Turion64x2 processor. It was a "refurbished" replacement by the
Costco Concierge Service for the CRASHED 2 year old 17.3" Averatec laptop w/XP that was purchased there. The "service people" couldn't find a
new motherboard, so they sent the HP as a replacement. It worked fabulously and fast!
BUT, after 2 years IT started PERIODICALLY saying it "couldn't find an operating system" upon boot-up.

Shutdown ... wait ... reboot ...
sometimes seem to fix the issue. I also periodically cleaned up the system and registry.
Eventually even that didn't work! Bios harddrive check said the primary harddrive failed.
So... I bought "2" new drives (since it had a second "operable" drivebay) and used the second as "data" storage only!
WooHoo! After a year it started happening again ("couldn't find an operating system"). Again, Shutdown ... wait ... reboot ... sometimes seem to
fix the issue. And again, I periodically cleaned up the system and registry.
Again, eventually to no avail. Curiosity (after running the Bios harddrive check again, which said this harddrive also failed) then caused me to
to remove the "failed primary drive" and connect it thru "usb adapters" to my OLD ponderous DELL desktop. It read the drive, and files, with NO
problem. Opened files, with NO problem. So, I did the same with the first "failed harddrive". Same result!! Oh an error I saw only twice said in
part, the TPM may be damaged or missing! ???? Transaction Processing Module???
Looking thru the "failed" drive(s) system files, using the usb hookup, failed to produce anything appearing to resemble "TPM".
Installing another new drive did absolutely NOTHING. The system couldn't find it at all.
Comments????