Brief blank/black screen when loading desktop

Xref: kermit microsoft.public.windowsxp.video:33018

And once again...

Problem: After loading all (around 20) hotfixes, I
encounter a brief (3-4 seconds) black screen when the
desktop is loading.

Specifically, the desktop begins to load with the lovely
MS tune and then I get a black screen for about 3-4
seconds and then the desktop returns and finishes
loading. This did not happen before I grabbed all the
updates, so I suspect that it may have something to do
with one or more hotfixes - display driver is up to date.

XP Pro SP1
NVIDIA GeForce4 420 Go

Toshiba Satellite Pro 6100
2.2Ghz
60Gb
512RAM