Just call Microsoft. They will verify whether the numbers you have a even valid... Someone could have sold you pirated numbers... Glenn Sullivan, MCSE+I MCDBA David Clark Company Inc. -----Original Message----- From: Herchenbach, Jim [mailto:jherchenbach@xxxxxxxxxx] Sent: Thursday, December 11, 2003 1:41 PM To: windows2000@xxxxxxxxxxxxx Subject: [windows2000] xp question OT I just purchased 6 new liecenses of XP pro....went to install it, and now when I try to install sp1, I get an error stating that my xp number is invalid...blah blah blah...please contact your vendor or microsoft antipriacy devision. ok, i know my license is valid, the only thing i can think of is that I incorrectly put in my code. Where can I check this on my PC/registry? tia Jim