bug in comodo now i cant uninstall

i have been using comodo free internet security + system cleaner for a while +all was well …now my pc has slowed /keeps shutting down/not starting properly … i think comodo has caused the problem… when pc starts — an alert appears … Ooops you have just found a bug in comodo + it needs to close … have tried to remove comodo even in safe mode same prob Ooops/// now i cant uninstall comodo …i have tried lots of methods all with no joy… tried to remove because even windows firewall / defender will not start can anyone help as i have so much on the pc +do no whant to use my recovery disks i am using vista home premium sp2…
please help as im getting very frustrated please lol celticman

Try Clean-up tool for Comodo Internet Security. That should do the trick for you.