I have a original vista business...with SP1 installed
Not sure since when , my vista can't restart properly

after loggged out...it just appear black screen..the pc just wont reboot it self..

how to fix ar?

maybe have virus or spyware..

i suspect is something wrong with the vista
couldn't be virus

i have no shutdown problem

If you can shutdown the computer properly, try booting to safe mode and then use the restart command there to reboot the computer to normal mode.

try booting with "Last Known Good Configuration". (Press F8 just after POST screen)

Try registry repair, sometims it works

What kind of answer is this? Mind to tell how to 'repair' registry?

Did you juz install the service pack then suddenly got thiz? If so, ur problem same as mine. Try to do scan disk. Mine solved already with juz thiz do thiz thing

do scan disk, ram check..