Help, my device manager is not working. I am running Windows 7 64 bit on Asus U31J laptop. When I try to use device manager all that is shown is a white box with no devices listed. I have checked plug and play and it seems to be enabled correctly. I also ran sfc /scannow but it did not find anything. Also, not sure if it is related or not, but when I try to connect my ipad or iphone to my pc to download pictures it no longer works (autorun does not start and the laptop does not appear to "see" the ipad or iphone) and also a dongle I used to use no longer works (it works on other computers though so it is not the dongle). The usb ports do not seem to be the problem as I can use them for a mouse or external drive.