Contact MS to see if they can help. . .Good Luck.
In addition to Lee's suggestion, you can also check your installed programs view to make sure it didn't register as installed; however, if it did, then you might want to try invoking the repair function from that same view. Also, as Windows 8.1 is only in Preview Mode, there is no guarantee that any program will work with it yet so expect the unexpected. Good luck.
Got it fixed after hours of trying different things.
Only thing I am stuck with 32bit version.
Which I think won't be a problem because I highly doubt any one office app will use more than 4gb ram.
Stuck with an x32bit version of what? Was your OS x32 and you were trying to install an x64 version or did you downgrade your OS to x32 and it worked?
I have 64 bit windows. Just for some reason installing 64bit version didn't work,tried 32bit version and that installed fine.