Ok, I have a SanDisk 8gb flash usb pen.
I was using it nicely until VirtualBox (Meh.. oracle... messing up software since years) messed it up.
Basically this is what happened: I could use this usb pen correctly and see the files in it on this PC. I could use it on any other pc (I work as programmer, I put my hands on lot of PCs). Some days ago at home, I was using VirtualBox with Windows 8 on it and I wanted to try to plug in the usb pen drive to see if I could exchange data between the virtual machine and other PCs (long story about this particular choiche of transferring data).
What I did was go on virtualbox menu-->devices and click my usb.
From then, my usb didn't got recognised either by VirtualBox (I wasn't expecting anything more) and ALSO, from my desktop PC. I can use it with any other computer, see the files in it, cancel/write data, browse the folders, etc etc.
Tryed to uninstall the driver and plug it back, but nothing.
What's happening, and how can I fix it?