Cannot uninstall avast 4.8

cant get into safe mode up down arrows keyboard dont work
cant open
program settings in avast
cant run avast removal tool in normal mode
cant delete program from control panel
tried new install over the top it gets to uninstall and error messages
i could slip the windows disk in and reformat but im buggered if im finished yet
Oh....cannot select safe mode from
MSCONFIG boot.ini either