Vista - Vista SP1 update done but won't startup

I updated and installed the Vista Service Pack 1 completely and
successfully last night, and as it reboots, it goes to a black screen
with something that looks like a file and registry data check, around
3 minutes it stops at this registry and won`t go through, this is what
the screen says:

! ! 0xc0000034 ! ! 60442/61646 (\Registry\MACHINE\SOFTWARE\classes
\Appli...)

The screen keeps flashing as like it's still looking for that file,
but the number doesn't increase and it won't go through that stage (I
left my computer for the whole night and it still didn't boot up)

So I rebooted the computer and try the startup fix, it didn`t find any
problem with the system, so I tried Advanced options, but only to find
out that there`s no records of my system restore point as I tried that
method, which is weird since I had restored my system in the past and
my system restore program has been on for a long time.

Hopefully someone can help me with this problem and give me some
alternatives before I have to send my laptop to the company for
repair.

My laptop is the Dell XPS M1330, let me know if more information is
required

Thank you very much!

have you tried repairing? either vista install disk or there is a repair partition on the disk