Well what error(s) do you get? Need a little more information than "can't install programs".
Are they compatible with Windows 7 (have you checked?)
What exact error message do you get?
Is your administrator account in the administrators account group for your local PC? <--- this is a big one.
for: Ms Office 2007 & i know it is Win 7 compatible.
I will get the error message later ...
How to check if the Admin account group for your local pc? .... i don't know how to verify this. please help.
Wild guess but is the computer account in a restricted OU? For example even if you have admin rights to the machine and even if you have domain admin rights if the computer account is in the wrong OU you may not have admin rights to that OU. So i would suggest checking the OU the computer account is in and making sure you have rights over that OU or if the OU is restricted some how.