1.Click on Start, type the following command in the search box, and then hit the Enter key.
%temp%
2.To remove individual folders or files, hold down your Ctrl key while left-clicking on each item you want delete. Release the Ctrl key when you're finished.
3.To delete these items, hit your Delete key or click the Organize button on the toolbar menu, followed by the Delete option.
4.If you'd instead like to remove everything inside the Temp folder, click on the Organize button and then choose Select All from the menu.
5.Again, to delete these items, hit your Delete key or click the Organize button on the toolbar menu, followed by the Delete option.
6.After all of the files have been deleted you can close the folder window and empty your Recycle Bin, permanently removing the files from your PC.
Tips:
1.You may receive a Error Deleting File or Folder message while the files are being deleted. This 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 you still receive the message, try restarting your PC and repeating the process again.