After compressing files to create more space, screen froze and stopped compressing files. On reboot black screen with 'BOOTMGR is compressed, cntl+alt+del to restart' top left of screen. This did not work. Tried using my 'Toughguy' restore disc only to find they had errors-'Component EditCntlsU.ocx' or one of it's dependencies not correctly registered: a file is missing or invalid' Any suggestions what to do next???? Thanks.