Please be more specified!!!! i have the same problem but i can't understant what did u do to work it out!!! same w7 problem with UAC turned off etc. etc. etc. same error!!!! X( I agree ... thats not very useful when someone says it has worked for them and not give any details about it. However for anyone having problems on Windows 7, I solved it by editing the USB_MultiBoot_10.cmd script. At the very top you will see a line VER | find "6.0." > nul Change it to VER | find "6.1." > nul to detect that its Windows 7 you are running the script on. fsutil should then recognize your drives correctly. Hope this helps .... do let me know if it doesnt ! How do I change the USB_MultiBoot_10.cmd script?