Serials And Keys How To Uninstall A Specific Program With Its Registered Keys?

How to uninstall a specific program with its registered keys? - serials and keys

How can I uninstall a program with all its components, such as the serial number ..
For example I have a shareware program that I bought the clock and the serial number of the program and now I want to uninstall and delete the set of keys as well ..
I've tried to uninstall normally, but when I to install again I have my serial number is still there ...

so any ideas? I have heard that there are software eliminates such programs