I have a machine that was infected with the PE_MTX.A virus. After cleaning the machine, Office 2000 no longer was operational. It kept trying to reinstall when bringing up Word. Tried to reinstall "Invalid version, remove present version & reinstall." Did that and now when I try to install, I get as far as the Install and Custom button. When I click on the install button, the window goes away and nothing happens. Any suggestions????