So my machine is running Win7 perfectly but a friend who runs Win10 asked me if I could download the Win10 boot prog on a flash drive for him. I didn't see any harm in doing this but I made sure I specified I wanted the prog to install on another machine and it was to be downloaded direct to the flash drive (E). Everything went fine and at the end of the day I closed down my machine. The next day I boot up and immediately notice something has changed - it's taking longer to boot and it isn't the normal screen - it's the boot up screen for Win10! Now it wants me to start setting up the new installation and the only way I can get out of it is to pull the power. So now I double check there are no flash drives or anything connected and then reboot - same result! Now I reboot again but this time I go into the bios and bloody Microscrewup has placed a virtual flash drive in the system which is a clone of the one I created for my mate, and the system has been reset to boot from it! So I try to reset the boot configuration but you can reorder the other drives but not E it remains fixed in place. I also notice that the Boot Over ride option has been activated and E is at the top of the list there too. I deactivate the Boot Over ride and now I can move the virtual E drive down the boot order. Back in Win 7 I use Disc Director to format the virtual E drive so it can't be booted from again, and now I don't have a problem with the booting side but it has screwed up the use of external drives completely. Whenever I plug in a flash drive it is now always seen as a copy of the original E. No matter what size it is always reported as 4 gb (same as the original) and the drives files are not seen. I have run sfc/scannow and it reports no problems. I do have restore points but each time I try to use one it comes back reporting failure. Do any of you geniuses out there have an idea of how I can get my machine back?