Yesterday, I used my home PC and used a small USB disk for some data transfer. But in the same evening, it was not recognizing my cell phone (although cell phone recognized that it has attached to a PC, and offered me to behave like mass storage, which I selected)
After some tries, I tried the same USB disk I tried earlier, and found that too is not working!?
Device manager shows all the controllers and hubs, with no hub indicating any attached devices.
Even uninstalling all controllers/hubs etc. and rebooting the PC didn't help (off course all controllers/hubs came back after rebooting)
Note that between two events (i.e. working and not working) there is nothing, just some reboots.
Config: Dell Optiplex GX270 (P4), 512 MB RAM, 160GB hard-disk, WinXP SP3 with latest updates.