All of us install several programs in our laptops and computers because it is not useful without these programs. The functions already present in the operating system will not be enough to do many operations. Sometimes the programs that are present in the operating system and those that are already installed may not be useful.
You would have installed some programs as a part of a trial. So, removing such programs will at least leave some space in your system. Your computer will run at a greater speed with the removal of unnecessary programs and you can install new versions then. However, while removing certain programs you are bound to face certain uninstall issues.
A very common uninstall issue is when you attempt to install a program that already exist in your system and this is a result of improper and unfinished installation. Such an issue can be solved only by reinstalling it over again. After reinstalling the original version you can remove it from the control panel and install the new version.
The other issue is when there are certain corrupt installation files or when there is a conflict with the system and uninstalling process. Suppose there is a restore point that was made when you were uninstalling, you can start uninstalling from that point again. If there are no restore points then you have to reinstall it again and then uninstall it.
The other popular uninstall issue is when the program was deleted but some programs were not able to be removed. Such an incomplete installation produces some system files that are of no use to your system at all.
You can find such files by going to the Windows/System32 or Windows/System folder and then remove them. The Windows Installer Cleanup Utility removes all the unnecessary files. You can also use a third party uninstall utility that removes all unnecessary registry files and system files.