How to prevent Windows 7 indentification!

Hello,

I'm using a software that detects my windows 7 system (Without changing or creating any files on the system (I use DEEPFREEZ - I refresh my IP) ) so basically first time i run the program it reads some info about my windows 7 and save online *secretly* so the next time i run it, it detects me!

I wonder what information are unique about my system that can get me identified and how i protect my windows 7 against it to make it look like it just installed?

Thanks

Hi Krimoon,
The only true/unique information on your comp
Whatever you've installed!!
including the passwords for them
the product ID code if its retail or OEM system builder, and
any GPO's set by you.

The installation date is in multiple system files, normal/MS and OEM system set-up files.
Program installation dates are also included, and i dont think anyone knows where they all are,
(best guess 100+)

Roy

Thank you Roy your reply inspired me!

Its was the products ID, i have suspected this before however i did only change it from Registry when i should change the product key to make the change.

The software didn't recognize me.