Every time when I try to open My documents, or My computer, control
panel, search, or any folder on my desktop, my computer crashes. It
says, on a blue screen(!) something like this:

"A problem has been detected and windows has been shut down to prevent
damage to your computer.
If this is the first time you have seen this Stop error screen,
restart your computer. If this screen appears again, follow these
steps:
Check to be sure you have adequate disk space. If a driver is
identified in the Stop message, disable the driver or check with the
manufacturer for driver updates. Try changing video adapters.
Check with your hardware vendor for any BIOS updates. If you need to
use Safe Mode to remove or disable components, restart your computer,
press F8 to select Advanced Startup Options, and then select Safe
Mode.

Technical Information:

*** STOP: 0x0000007E ( 0xC0000005, 0x804EB951, 0xF62A1BB4, 0xF62A18B0)

Beginning dump of physical memory.
Physical memory dump complete.
Contact your system administrator or technical support group for
further assistance."
--------------------------
After I press restart, and windows start up, a pop-up window comes up,
it says that my system has been recovered from a serious error.
Do I wish to send this error report to microsoft....
BCCode : 1000007e     BCP1 : C0000005     BCP2 : 804EB951     BCP3 :
F8965BB4
BCP4 : F89658B0     OSVer : 5_1_2600     SP : 2_0     Product :
256_1

And this in the report...
C:\DOCUME~1\Josip\LOCALS~1\Temp\WER66a3.dir00\Mini052208-04.dmp
C:\DOCUME~1\Josip\LOCALS~1\Temp\WER66a3.dir00\sysdata.xml
---------------------------
I've read somewhere online that I can check the error report this way:
right click on My computer> Manage> event viewer > system....
I did this and properties of error were:
Category :(102)
Event ID: 1003
.... and then, some numbers....
-----------------------------
I can open only some documents on desktop which aren't in a folder and
some programs on desktop. From start menu I can open ONLY microsoft
word and powerpoint, notepad, Mozilla ...
-----------------------------
Before this problems started I've been trying to get a webcam to work,
Logitech, and I've messed with run>msconfig .... but I think I checked
it alright after...
and since I couldn't fix my webcam drivers I installed a program
called Splitcam, to get my webcam to work.
And I installed a new version of Nero for burning cd-s.

But I uninstalled the webcam and Splitcam with TuneUp Utilities, soon
after I started to experience these 'serious error' pop-ups and blue
screens....
I can't uninstall Nero, cause I can't access it on add/remove
programs...
And TuneUp don't shows it on the list of installed programs!
---------------------------------
I've scanned computer with AVG and ZoneAlarm, I got nothing for
viruses.
-----------------------------------
I have Windows Xp professional, with service pack 2.
-------------------------
Please, what can be causing this, and how can I stop it to crash every
time I try to open my folders!

Thanx in advance!
Ana