You are screwed! Just reformat..haha..j/k. Looks like the MSI got hosed up. I would run the Windows Installer Cleanup utility to get rid of Alcohol..simply install it, select Alcohol 120% from the list select REMOVE..and it should be gone gone byee byeee. DO NOT click REMOVE ALL...this will wipe out all your software and is a no no.
Go here and scroll towards the middle you will see where it says "Download the Windows Installer Clean Up Tool"..