Hi,

it jus doesn't work like that! When you "format" a HD on a computer, I suspect you mean that you installed the operating system as well? Well the installation of the OS will set the computer up with the correct drivers for a number of different things:

Processor type, Memory type, Motherboard, display adapter etc. This hard disk can ONLY be installed on an IDENTICAL computer in order for it to work.

You could try installing it on the Compaq but I suspect that all you'd propably be able to get at the max is a safe-mode boot with no network-support.

The only way to go is take a HD and install WIN on the CPQ with the new HD in place.

It might be possible to change all the different settings for the Compag using the Dell HD but in my opinion you'd have to be a rocket-engineer and still you'd propably fail...

Sorry!