I finally broke down and built me a new computer and now I have question. On my old computer ( Compaq Presario SR1504x) I would like to know if I can use the folder marked "Windows" for the OS on my new computer and use the key for the old system. Be nice as I am a newbie and don't know a lot about software.
Thanks in advance.

BTW: New system:
GIGABYTE GA-G31M-S2L LGA 775 Intel G31 Micro ATX Intel Motherboard
Intel Pentium E2200 Allendale 2.2GHz LGA 775 65W Dual-Core Processor Model BX80557E2200
pqi POWER Series 2GB 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400)
EVGA 320-P2-N811-AR GeForce 8800GTS 320MB 320-bit GDDR3 PCI Express x16 Video Card
ASUS 20X DVD±R DVD Burner SATA Model DRW-2014L1T