Lidia

I can not open some programs. But i have never deleted them. My friend said i lost some dll files in widows registry which may need a cleanup and repair. What's that meaning? I'm not knowledgeable in computer,but it seems that your product has something to do with windows registry.

apt-support369

Some incorrect or incomplete installation and uninstallation will definitely cause some registry problems.
And some dll files are shared by more than one programs,so they might have been deleted when you remove other unwanted programs. Advanced PC Tweaker can repair those registry problem,meanwhile,it also cleans useless things in computer.