If you mean 11.2, then yes, I have installed on 4 systems (Win 7 x64) and all are performing quite nicely. BTW, did you remove the previous version before installing the current OR did you install over the old installation?
Regardless, I would recommend you download and run driversweeper to completely remove the current/loaded drivers. Then re-download 11.2 from ATI/AMD. Then restart the system and install 11.2 (just like a new install at this point).
Good luck!