Sometimes it is just as simple as the original file folder not being
deleted with the uninstall. It is common that folders are left intact
even with logs and such for future reference for a future installation
of the program or app. Just deleting the folder after a "successful"
uninstall might do it.
More...
You might secure this machine from future mishaps, there are so many
options to keep out the b.s. If you are the administrator you can create
a profile for users and keep your settings intact always. You have the
option to set privileges for users and others. You have much to learn if
you want to control your machine with an iron fist but you can start
with a good logon password and work your way up. good luck.
Administrators: Administrators have complete and unrestricted access to
the computer/domain
Backup Operators: Backup Operators can override security restrictions
for the sole purpose of backing up or restoring files
Guests: Guests have the same access as members of the Users group by
default, except for the Guest account which is further restricted
Power Users: Power Users possess most administrative powers with some
restrictions. Thus, Power Users can run legacy applications in addition
to certified applications
Replicator: Supports file replication in a domain
Users: Users are prevented from making accidental or intentional
system-wide changes. Thus, Users can run certified applications, but
not most legacy applications
