AVAST FULL UNINSTALLATION
Note:-this process only for that in which avast uninstaller (clear) created two or more operating system(os)..
step1:-first press the key where window symbol is there..
secondly press key R on keyboard
BOTH key have to press at
same time ..
sstep 2:-there is window of run is opened up...on this type msconfig from
keyboard..and press ok..
step 3:-there is window pop up
step 4:-select boot option
step 5:-Now select the OS
which is generated by avast uninstaller ...select
and delete it..