Using windows 7 oem disk with a different product key?

[Thomas1965]

I need to format and reinstall windows 7 on my wifes pc. Her OS was a factory install. Can I use a windows 7 oem disk I previously installed on a pc I built with her factory product key?

 

[Samat]

If it is a OEM license key and the versions are same (for example home premium) then it should work without any problems.

 

[Math Geek]

should not be an issue so long as the version matches. most likely it is home premium but verify what the key goes with.