fluffy501

I have been using MS office XP for a couple of years, and i recently ran an unwanted file clearing program on my xp home. after rebooting, everything seemed to work, however when I opened MS Word, it says it must install new components and it asks for a file named 'PROPLUS.MSI'. I dont have my Office intsallation CD and now i can't use word. Is there any solution, or do i have to re-install office from another cd?