It is claimed that the following things need to be done to the computer, on a regular basis. If these things are not performed, the computer is liable to slow down and malfunction. I found this information on the Internet. It is necessary to remove the following items regularly: 1. Remove Corrupted Files, Internet Temporary Files, Cookies, Cache Files, URL and Download Histories. Windows Temporary Files and Log Files, Unused and old entries, including File Extensions, ActiveX Controls, Class IDs, Pog IDs, Shared DLLs, Application Paths, Icons and Invalid Short cuts, Unused Applications, Unused Windows Components, Unused User Accounts and Old Restore Points. Remove Temporary Files and Recent File Lists (MRUs) from many applications including Media Player, Google Toolbar, Netscape, MS Office, Nero, Adobe Acrobat, WinAce, WinZip etc. 2. Remove some programs that launch by default, when windows start up. 3. De-fragmentation and cleaning Registry Keys. How much of this is true?