I've been using the AdobeCreativeSuiteCleanerTool and ccleaner and also checked the registry to be sure nothing was left of the old installation before installing a new time.
I will see what can be done with all the suggestions you gave me and see what tomorrow will bring; i understand nothing about the Revo Uninstaller and as to the Microsoft Windows SDK for Windows 7, it works with .NET Framework 3.5 SP1 and my installation has version 4.
i'm far from being knowledgeable with these, and i would not be surprised if i decide to reinstall everything anew; i will then install Ps right after i've done Win7 without any updates, as pmbuko suggested.
right now, my brain is getting overload...
will be back another day.
for the great help so far, i'm super grateful. :-D
