Hi, (I'm not sure if this issue should be posted under hardware or software) Up until a few weeks ago everything was fine. As far as I know, no new hardware or software was installed on my Win 7 PC. During the last few weeks, external disks or disk-on-key connected to the PC are not recognized. They do not appear in “My Computer”, there is no icon in the taskbar and of course no pop-up comes up. I must say that the disks do get power for a few seconds and their indicators flash (on the disk itself) but after a few seconds it seems like the power is lost. A keyboard and mouse connected through USB work fine and if I switch them to other ports and use the free ports for an external disk, the disks still don’t work. Of course I tried all ports and different external disks and disk-on-keys. I tried booting in Safe Mode but then the mouse & keyboard didn't function. Perhaps I should uninstall all the USB components that appear in the device manager and let them be recognized from scratch, but doing that my mouse & keyboard won’t work either and then I’m stuck. That way I won’t be able to even reset the PC. Does anyone have an idea how to solve this? It’s really bugging me and searching online I couldn't find any similar problem (where mouse & keyboard work) and all solutions that I tried didn't help. Thanks for your efforts!