I bought a new copy of Windows 7 Ultimate 64 and installed it on my computer which had Vista Ultimate 32 on it. My hard drive is divided into two partitions, 200gig system; 550gig data. After Windows 7 Ultimate 64 installed it was working fine so I went to activate my copy and got the Microsoft Error 0xC004C003. I went to Microsoft Support and got the following:
Error code 0xC004C003
When you try to use a MAK to activate one or more computers, you may receive the following error message:
The activation server determined the specified product key is blocked.
This issue may occur if the MAK is blocked on the activation server.
To work around this issue, contact the PA Call Center to obtain a new MAK, and then install and activate the system.
I contacted the reseller that I bought the software from and he checked it and it showed that the key code is good. He also did some research and found a couple of online forums that showed if doing a "format" with Windows 7 and Vista installed previousily on the system where information is held in the BIOS that makes this happen.
I then used GPart to create a new partition on my harddrive and installed XP Pro which formatted the old part of the hard drive and installed. Then I allocated and installed Windows 7 Ultimate again on the new partition of the hard drive.
I need to know if anyone has experienced this or has a way to remove that data or a work-around.