Here is a guide which i made for those who are having trouble installing IASC on Windows Vista and Seven.
See the attached file.
Before doing anything on Windows Vista and 7:
Make sure to create a user with Administrator Priviledge and it needs to be password protected.
1. Logon to Vista/Seven using your usual account.
2. Launch the cmd prompt - Make sure you select, 'Run as administrator'
3. Net user administrator p£ssw0rD
4. Net user administrator /active:yes
5. Switch User, or logoff
6. Logon as Administrator Password p£ssw0rD
I did this installation several times. This has been confirmed also by one of the community users who was having issues.
All the best,