Crymoon

I'm not sure if it is a Vista or Office problem but I definitely need help.
After Cleaning my Computer with Adobe CS3Cleaner (and being stupid not
backuping my registry) I now encounter the following errors:

first it does not allow me to delete some files as it says I do not have
admin rights, but with most it works just fine.
But second and foremost I cannot access MS Office - every time I try to
start one of the applications it tells me that this application has not been
installed for current user and I should reinstall.
I have tried installing, repairing, removing and installing again and
nothing works.
I have only an Admin account and and an inactive guest account.
I have figured that due to CS3Cleaner something got messed up pretty badly
in registry so I tried to restore the system but alas it didn't work either -
and I mean restoring the system.
My guess is that somehow the user got messed up and... well I do not know
that's why I'm asking for your help.
And please tell me that reinstalling the system is not the only way to do it
as I have set (after some time) everything that it suits me just fine and
resetting it all again... oh well you know...