Problem installing iTunes (iTunes.cab thing)

Hi!

I had iTunes a couple of months ago, but our computer crashed, apparently because of iTunes, so I'm told, and now I can't seem to download it again.
Everything is removed, every file and so on, of iTunes.
I tried reinstalling iTunes several times now, and everytime I get an error : C:\WINDOWS\Installer\iTunes.cab not found.
Can somebody please help me?!
Thanks x