Have you recently installed any programs?
Which firewall, anti-virus, anti-spyware or security suite is installed?
There are some that cause problems which don't always appear immediately.
Do a thorough check for malware, following all of the steps at one of these
Web pages.
Help with malware:
All MS-MVP Sites.
Consider this: Whenever a new error condition appears on your computer, it
is almost certain that there was some change to the computer soon before the
problem began.
http://aumha.org/a/parasite.htm
Unexplained computer behavior may be caused by deceptive software.
http://support.microsoft.com/kb/827315
http://aumha.org/a/quickfix.htm
http://www.elephantboycomputers.com/...moving_Malware
http://mvps.org/winhelp2002/unwanted.htm
http://inetexplorer.mvps.org/darnit.html
http://www.mvps.org/sramesh2k/Malware_Defence.htm
http://aumha.org/a/parasite.php
So How Did I Get Infected Anyway?
For quite a few people it's by installing programs like Messenger Plus,
whose ads for malware don't identify the malware as such and try to convince
you that you owe it to the author. See also:
http://www.wilderssecurity.com/showthread.php?t=27971
Don't ever do a "default" install of anything. Always choose Custom and see
what else is
being carried along. Don't install any extras you're not sure of.
-------
*Report back, please*
<> wrote in message
news:a5f7a24b-ea4c-44e6-be63-...
> Hi All,
>
> Stange problem only just started occuring.
>
> If I 'Shutdown' Vista (SP1) after I've finished my session it will not
> start up again.
>
> It just gets to the black screen with bullet going left to right and
> stays there forever.
>
> If I reste the PC and try again, no difference.
>
> If I reset abd choose 'Last Known Good Configuration that worked' then
> it boots up OK.
>
> If I then do several 'Restart's' it boots up OK each time.
>
> ..However...if I choose 'Shutdown' again, it fails again next time I
> switch on.
> I then have to choose Last Known Good..etc etc..to get it to work
> again.
>
> Anyone any ideas what in the world is going on ?
>
> Event logs don't seem to shwon anything..
>
> Jim.