This doesnt look good. My guess is that one or more of the updates messed up quite a few registry settings and the problem was not rectified by uninstalling the update. Also since 7 is a new OS, there doesnt appear to be a reg fix posted out there yet, like some for vista. The only thing possible now is to live with the problem till it is corrected by MS in say sp1 or do a repair install.
Repair Install
Backup any data files on C: drive before doing that and keep your
driver/ app cds handy just in case.