Unknown Logging Off Loop Error

Hi There just latey after building my very first computer. It My Vista has seem to taken a turn south of the border. I'm not really good at these kind of things when it comes to fixing problums. But t has never stoped me from trying to learn and fix them from help support by Forums.

As of two days ago my Windows Vista logged me in the middle of the night while working on some Graphic Designing. It sent me back to the User Log on screen, but every time I try to enter my Administaro or User Acccount. It says prepearing desktop and then quickly loggs me right off. It won't load the desk top or any applications. Not shure how it happen but it feels like maybe I've aquared a little bug after installing windows,programs, antivirus, spywear removers. It's become really botersome not bein able to run my Vista CD to maybe try and repair damage files. But my CD is a Upgrade version so it wont load or read in safe mode.

So far as much as i Known, Account Admin can be logged into from Safe mode with Command promp/networking/debugging But not on normal start up~

I've ran AVG/ZoneAlarm/SpyBot/ but none of them seem to be helping my case as for registry cleaner or remover.. thats something I am not really good at and understat to great so i rather not tapper with it without help. From my research online is seem like a LOGGING off Loop similler to problums form XP users in the past.


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Windows Edition:
Windows vista Extreme Edition Build 1

Severice Pack 1:

System:
Manufacturer: Tsugaru Customs
Model: Tsugaru EyE PC Core

Processor: Intel(R) 4 CPU 2.40GHz
Memory(RAM) 4.GB

System type: 32-Bit Operating System
Tablet PC Functionality: Avaiale
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Hi Keitaro

Please do the following:

Press F8 when booting, and from the option, please choose "Last Knows Good Configuration"

If for some reason that won't sort it out, then please reboot and boot it into safe mode, this usually asks if you would like to use a restore point before entering safe mode.