I installed windows 7 Ultimate with no problems.
But windows 7 can't read my USB so I can't installed the drivers. I didn't have this problem the first time.
Anyone know the problem?
I tried to plug in others USB's but it can't read those neither.
Please run the following two procedures
Resetting the System Management Controller (SMC) on your Mac - Apple Support
How to Reset NVRAM on your Mac - Apple Support
If it does not work, try re-installing Bootcamp drivers appropriate for your specific mac model. The drivers are available at Install Windows 7 and earlier on your Mac using Boot Camp - Apple Support .
USB not working in Windows 7
