reappearing

while trying to type using MS word i am not able to get the desired font. the font Mangal is reappearing stubbornly,i am :))not able to type with the font of my choice, please help.

My pc runs windows 2000 professional. After each restart following files get created C:\Program Files\A.ico C:\Program Files\a.zip C:\Program Files\B.ico C:\Program Files\z.zip C:\Program Files\c.zip C:\Program Files\Setup.exe C:\Program Files\Track_03.exe C:\Program Files\video.exe...