Lazlo

I have installed SP1 in the morning. Took a very long time .
After installation it gave me trouble with starting up, but managed somehow
to get is started at least once.
It said I had a problem with my modem driver.
I tried to get an updated driver, but windows told me I did have the latest
version.
Anyway I shut off the machine again but it doesn't want to get started now.
First I get a screen with two option:
Launch Startup Repair
or
Start windows normally

The first option doesn't work at all. Nothing happens.
The second one restarts windows and gets me to a Bluescreen with memory dump
The error message is:
0x00000007 (0x000011013,0x00010204,0x833D2938)

have no idea what it means

Can anyone help ?

Lazlo