hey guys i'm getting the same error.. also using Win7 x64 Enterprise Edition (running vlite on a x64 system) I have WAIK for vista SP1 installed and mounted the install.wim as nuhi as suggested.. got an error sayin for a differnet version but was able to mount any suggestions on what might be causing Vlite to not rebuild the image... i have tried several times with no success? PS: Meant to say when i tried mounting the Win7 image with the vista WAIK got an error "windows system image manager excution failed"