pre buducnost: .old adresare (vsetky naraz) vie udajne zmazat aj windowsovske cistenie disku
http://social.technet.microsoft.com/Forums/en/w7it proinstall/thread/a88eca16-2cc6-421c-94fc-f444b9ef a889

Click on Start/All Programs/Accessories/System Tools/Disc Cleanup

When the dialog box comes up, select the drive that has the .old files on it and click OK

The system then scans for the files to be cleaned up and another dialog box opens with the selection. Click on the button labeled Clean up system files at the bottom of that dialog box.

Another dialog box will come up, select the drive again that has the .old files on it. The system will perform another scan for the system files that need to be cleaned up.

After scanning, another dialog box opens up and there you will find a list of check boxes. Scroll through and check on the box labeled Older versions of Windows and click OK.