Softare installation problems with Vista

My installation of Office 07 and Acrobat 7 won't run correctly on my new
Vista box. Each time I launch MS Word I get several dialog boxes that imply
that the program is being installed again, then eventually Word opens. Same
happens with Acrobat 7 and Corel Draw 11. Although I was able to fix this
problem with Corel and Acrobat by creating a new shortcut to the application
in the program files folder. Any help? Ideas? Suggestions?