Clean up the system today

• Login as each user and perform the following steps for each user

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  Delete unnecessary files that are not needed any more, from the desktop,
  Mydocuments, and other folders.

  
  
  
  

  Remove cached files from Internet Explorer or Mozilla Firefox, which ever your browser is.

  
  
  
  

  Remove files from temporary folders

  
  
  
  

  Run the Disk Cleanup by clicking Start --> All Programs --> Accessories --> System Tools --> Disk Cleanup.

  
  
  

• Login as Admin or with an account that has administrator privileges if you have not already logged in so.
• Uninstall unnecessary programs those you do not need/use any more (make sure you have the install program some where with product code, in case if you wan to install again in future. Good example is I have Microsoft Flight Simulator installed 6 moths back which you is not use now as I am not interested to play. Before you uninstall it, make sure you have the original software and it's product keys available in case if your nephew want to play during his vacation.)
• Many of the above tasks can be done with the simple program CCleaner. Install it and run it in every user profile. It has File cleaner, Applications Cache Cleaner, Uninstall applications feature, Startup programs cleaner (use it cautiously, you can not undo it, you have to manually add the registry entries if you have to undo, better note down if you delete any entries , never delete antivirus program entries for example), Fixing registry entries and many more. Definitely go through the Quick Tour to get an idea before you download. Caution: Some of the options that you select willl remove the cached Internet User names and Passwords.
• Once you done the cleaning, Defrag the drives