While trying to install VP 9.0 64 bit I get the following error: ....\Shared Plug-ins\Audio\mchammer_x64.dll failed to register. HRESULT-2147023898. This happens on 11 other files in the same directory. The only way I can continue the install is to hit the Ignore button when the error pops up. If I try to start the program after the install I get a 'Vegas Pro has stopped' window offering to send error data to Sony. Any suggestions on how to get the program to install correctly? My PC has Vista business 64 installed.