Windows 7: Verifying PMI Pool Date Error

Hey everyone, I'm new to the site and hope to have a great stay. Not sure if I posted under the correct Thread so please forgive me.

I'm experiencing the problem above when trying to Boot up my PC, it get's stuck there. How this happened is I was fixing my friend's PC, I was failing to make it work so I took out his HDD and connected it to my PC as a Secondary Drive, hoping to run a Virus scan through it, well it didn't work. So I took it out, only to later find out that my PC no longer boots aswell..... With the above error message. Checked my Bios, everything looks normal, Primary Boot set as my HDD or DVD drive still nothing works.

I'm using Windows 7; 2GB RAM; P4; 80GB HDD-IDE; SATA DVD drive.... Please let me know if I left other important info.

Hope all is in order
Thanx

May be here:
Computer Hangs at"Verifying DMI Pool Data"
and here:
http://www.computerhope.com/issues/ch000474.htm

Looks you have to reset something in order to boot.

Tried those methods, nothing works... I've got so much important data on this HDD, I can't afford to re-format

Humm, so 24hours without enter the Os...

You might want to uplodad a camera shot of your Bios settings...hope some passing by aswell...

I've tried everything, my last resort will be Formatting and losing everything