You mean this driver? I'm not sure this is the right driver because in device manager it shows driver version as 1005.22.615.2011, which is dated 6/15/2011 and windows update says it's already up to date. Am I looking at the right one?
ASUS - Networks- ASUS PCE-N15
For win7 64 bit, it shows under the wireless tab that the latest driver is 188.8.131.52