I have a HP Pavillion DV4 laptop that I bought 4 months ago with Windows 64 bit Home Premium installed. Unfortunatly the 64 bit OS is not compatable with several software packages I have to run so I loaded Windows 7 Ultimate 32 bit on it after wiping the drive. Now my SD card reader doesn't show in the removable device drive view. It does show in the device manager. I uninstalled the driver and then reinstalled it a couple of times with no luck. How can I get the SD reader working again?