Go to temp folder keyword shortcut %temp%

To delete your Windows temporary files on Windows Vista, Windows 7, and Windows 8:

1. Click on Start
2. Type %temp% in the search box, and then hit the Enter key.
3. Click on one of the files in the folder that just opened, and press Ctrl + A to select all of the files in this folder. 
4. Press the Delete key on your keyboard. 
5. When prompted if you are sure, choose Yes.

If you receive a Error Deleting File or Folder message while the files are being deleted, it just means that one of the files is in use by a program right now. Click OK, close all open programs, and repeat the steps above. If this continues, try restarting your PC and repeating the process again.

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 To delete your Windows temporary files on Windows XP:

• First, you will need to delete the standard Windows temporary files:
  1. Click on the Start button.
  2. Click Run.
  3. Type temp into the available text field and click OK.
  4. In the new window that opens, click on Edit at the top and choose Select All.
  5. Press the Delete key on your keyboard.
  6. When prompted if you are sure, choose Yes to All.
• Next, you will need to delete temporary files specific to your login:
  1. Click on the Start button.
  2. Click Run.
  3. Type  %temp% in the available text field and click OK.
  4. In the window that opens click on Edit at the top and choose Select All.
  5. Press the Delete key on your keyboard.
  6. When prompted if you are sure, choose Yes to All.
• When you've finished emptying your Temp folders, be sure to empty your Recycle Bin:
  1. Locate the Recycle Bin icon on your Desktop.
  2. Right-click on the Recycle Bin and choose Empty Recycle Bin.
     • This may take a few minutes if there are many files.