I'm trying to use my Radeon R7 on my computer running Vista SP2, with no luck. All workarounds I have tried have failed, claiming the modified installation file contains no driver compatible with my hardware. Both with show compatible hardware checked and unchecked.
It seems my only solution is to send my Radeon back to the retailer and get a Geforce.
Getting an other brand of GPU = Free
Getting a new OS = $119