If you are getting system running slow it means something wrong inside your system that you should solve immediately before things get out of control and fix a slow running computer.

There are a few things you can do to be sure your computer runs in top speed.

Because of Junk files your system slows down. Try to run windows updates regularly and update your computer's security and windows files.

To do a Windows update, click Windows Start Menu -> Programs -> Windows Update.

One more thing you could to ensure your system is safe from any spyware, malware, virus and other unwanted software, try to remove this unwanted thing from system and scan your system. This kind of malicious software’s collect personal information like your username and password, bank account details, Credit Card info and other important information that can be misused to their benefit. If your computer's registry is packed with all kinds of junk files, broken files and unwanted used files because of this file your system run very slow. You may run a free registry scan for Windows to fix this issue