How to uninstall Ubuntu in a UMPC
 

A friend wants to sell her UMPC, witch has Windows Vista and Ubuntu. The system doesn't have a CD/DVD drive, so how do we remove Ubuntu and restore the mbr to a windows one?

You could boot it to USB, then install over the network. What is the model/brand? Perhaps somebody has already figured this out for you.

The manufacturer must have provided some kind of recovery system. Check that out to recover your old mbr.
http://windows.microsoft.com/en-US/w...covery-Console

http://www.sysint.no/nedlasting/mbrfix.htm

@MS3FGX
The op said remove ubuntu, not install.