WHQL CAT file questions

Hi

I am writing ONE new driver/INF and this driver runs on 2k8 R1 SP2 x64, 2k8 R2 SP1 x64 and 2012 x64, the same INF is used for all 3 OS’es.

My question is do I have to run WHQL on all 3 OS or just run WHQL on any 1 OS and then use that 1 CAT file retuned back for all 3 OS’es?

Thx

You need to run WHQL on all flavors of os but while signing the cat file
you can get it signed for all os by submitting a single package for all os…