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REMOVE PREVIOUS WINDOWS VERSION FILES

If you're getting short on disk space, and you installed your current version of Windows over a previous version (which you never expect to go back to), here is a way of getting back some needed storage space: just get rid of the files used by Windows to store the previous version. There are two of these files and their names are Winundo.dat and Winundo.ini. You can search for them using the Find dialog box in the Start Menu. Winundo.dat is described by Microsoft as containing "all of the necessary files to restore your own system settings. This file may be as large as 75MB." And the other file is described "This file contains information necessary to restore the files contained in the Winundo.dat file."