Every time I try to open an office application I get the "windows is preparing to instal" message . After cancelling it the application then opens.
I ran a search some time ago having the same problem and managed to find a fix by doing something along the lines of starting Excell in safe mode. Or running excell from "start" Run excell. Unfortunately I can't remember exactly what it was and now the problem has reappeared.
Any help obviously appreciated.