This will activate your copy of Windows Vista and make Microsoft think you have a genuine OEM copy of their operating system.
This OEM activator will work on any copy of Windows Vista with or without SP1 and also on both 32 bit and 64 bit systems.
Once downloaded just run the program select a OEM brand (any will do) let it install and then reboot your PC.
It's fast and easy to do.
Some antivirus may report it is infected but it is false alarm. If you do not feel comfortable, do not use this.