你应该照升级说明来做啊！
升级说明里说得很清楚，要先反激活原先的XP，装了SP1后再用另一个激活码激活
好象是这样，很久以前升级过，忘了。
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THIS ONLY IF U ARE USING DEVILS0WN WIN XP PRO!!!!! ?
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THIS IF U ARE USING FCKGW-RHQQ2-YXRKT-8TG6W-2B7Q8 ?
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THIS IF U ARE NOT USING WINDOWS XP PRO!! ?
? ?
? Er, its a bit hard... But... Oh well... Here goes! ?
? ?
? 0. Run a system resore to create a new checkpoint in ?
? case you need it. ?
? ?
? 1. Run deactivate.reg to deactivate the current ?
? activation... ?
? ?
? 2. Choose run from start menu and type in this command: ?
? %systemroot%/system32/oobe/msoobe.exe /a to get the ?
? activation screen and go to the second option which is ?
? activate by phone. ?
? ?
? 3. In the new screen choose the option to change product ?
? key, and type in the new product key (your Corporate one ?
? only). K2KB2-BDBGV-KP686-D8T7X-HDMQ8 ?
? ?
? 3a. If it brings you back to the prior screen after ?
? entering the new key click remind me later and then
?
? reboot. ?
? ?
? 4. Close that window, reboot your system and enter the ?
? command in step 2 for the second time to verify your ?
? activation , you should see "windows is already ?
? activated". ?
? ?
? 4a. Now install SP1 ?
? ?
? 5. If you havedo
ne this wrong or without a valid key ?
? you will not be able to boot. hit F8 and select last ?
? known good configuration ?
?
!]。