Yes you can upgrade XP with SP3 to Win 8. Also if you want Win 8 to look like Win 7, just get the program Start 8.
G20 with a AAC Evolution 40 Suppressor,G20C,G22,Sig P226R - (.40), Barrett Model 82A1/M107 - (.50BMG)
Desert Eagle Mark XIX .50 AE
Colt 1911 - .45