need help fast! - activate or no?

so i bought an acer, i more or less blew it up immediately upon purchase and then ended up taking out the dvd drive the ram and the hard drive and buying everything else and installing it in a new box and mobo. got it all working and vista booted right up from the hard drive.

however!

it says vista will activate in 3 days... does that mean it's going to check my mobo see it's not the acer it's supposed to be and explode? well i assume it won't explode, but will it work and if it doesn't work what exactly will it do? do need to run and buy a new copy of vista before my 3 days are up?

thanks in advance!

 

Yes, you'll need to buy a new copy of Vista. The installation on the hard drive is tied to the Acer system including the motherboard.