wubildr.mbr missing or corrupt

I'm dual booting W7 and Ubuntu (installed from Wubi). I've had it up and running a few times but today I'm getting a message from Windows Boot Manager when I select Ubuntu that wubildr.mbr is missing or corrupt. Any help would be greatly appreciated.

Solution 1:

It is a general problem that happens with WUBI.Since Ubuntu is installed to a file inside windows partition,it becomes susceptible to corruptions that generally happen in Windows.You can reinstall Ubuntu but I recommend a full install.

Solution 2:

I can't test this but first use bcdedit from an elevated command prompt to find your Ubuntu partition and its identifier. Then try:

bcdedit /set {<ubuntu_id>} device partition=<ubuntu_part>: