Can’t install Office on Sony Vaio with Windows 7

Hello, I have a Sony Vaio and use Windows 7. I have recently bought Windows Office Home & Student, but I cannot install it. I start the installation processes, and everything seems to be working until I get a message stating “This program cannot start because c2r32.dll is missing from your computer. Try reinstalling the program to fix this problem”.
What should I do? I don’t know what program is missing, but all other things work fine.
