Strange Behavior of Vista

[the-matrix]

it is eating al my ram and has to much security alert with this Windows Defenter it can`t even acccept and remember my AV EZ e Trust 7.20 it pop up with and want be to allow every time i restart vista and this piece of trach that is name Windows Defenter is something i very much would like to remove so all it`s files is gone ,i have try to remove windows vista beta software with this file vs_uninst_winfx.exe as it says i shall befor i can instal NET Framework 3.0 dotnetfx3setup.exe but it says i still have to remove Windows Communication Foundation befor i can instal NET Framework 3.0 but have try alot of times. but all open source app i use except Gaim Messenger 1.50 are working just as good as in xp home. Please help me with my problems with vista.