Microsoft Support

Microsoft Home Page

Sign in

Select the product you need help with

Select a solution

reformat activation issues. cant activate says key is in use.
about 3 weeks ago i had to reformat my computer. now when it goes to activate it says my product key is in use, i can now get it to activate. i tryed the phone automated activation an it says ive used
Windows Vista Home Premium OEM product key invalid for activation..
Unable to activate following a reinstall of Windows Vista Home Premium OEM using first the recovery partition, then the recovery DVD. I've also attempted to change the product key to the one from the
Cannot activate windows error: activation key is not valid.
Original title: my computer is telling me that the activation key is not valid and i know it is because i bought the computer at wallmart what can i do? my computer is telling me that the activation
product ( activation) key already being used?
Hi all, i have vista home premium sp2 .. i had to run recovery disk ( & have done in the past maybe twice). Now i'm being prompt to activate with product key(activation key).... but it now tells me
Activation Error code: 0XC004E003 (Product key already in use)
It has been more than a year i m using genuine windows vista but suddenly microsoft asks for product activation...i did it many times but nothing happens and again n again it asks for product