OK. I got my MP3 player working, and I think this is what did it. So for those that have similar problems with any other MP3 player or USB storage device, try this: I have been trying to get my Sansa to work with Vista for a week now (it still works fine with XP.) I would plug it it and the driver installation would pop up, but it would fail to find the drivers. The e270 would show up in device manager (twice, since I have a microSD card in it) under Other Devices, and would have the yellow exclamation point declaring that there was a driver problem. I recently had a problem installing Daemon-Tools. The virtual CD-ROMs weren't showing up in explorer, even though device manager showed them as being installed. After some research in the Daemon-Tools forums I found the solution to fix the virtual drives. I turned off all Daemon-Tools virtual drives, deleted "c:\windows\inf\infcache.1", and turned the virtual drives back on. They got reinstalled, and they are working fine now. I just plugged in my Sansa, and now Windows installed the drivers without any errors. Woo-hoo!