2.  Computers require regular maintenance

3.  Keyboard & mouse  Clean regularly  If spill turn computer off and clean immediately.  Printer  Clean the dry ink on the print head it causes blotchy spots.

4. Disk defragmenter

5. Recycle bin –holding area for final deletion of files and folders

6.  Temporary files may be created by computer programs for a variety of purposes; principally when a program cannot allocate enough memory for its tasks, when the program is working on data bigger than the architecture's address spaces, or as a primitive form of inter-process communication.

7.  cookie, also known as an HTTP cookie, web cookie, or browser cookie, is used for an origin website to send state information to a user's browser and for the browser to return the state information to the origin site

8.  You should not try some maintenance procedures.