What is DCOM?

On my system events, I see a whole bunch of DCOM Errors. When I click on it, I get this information.

Access denied attempting to launch a DCOM Server using DefaultLaunchPermssion. The server is:
{00020906-0000-0000-C000-000000000046}
The user is Unavailable/Unavailable, SID=Unavailable.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

Event ID is 10003 and I still can't figure out what it is.

This is happening on my laptop and I recently installed a wireless aircard. However, I don't think it has anything to do with that.
From time to time, I get the Blue Screen of Death and the laptop automatically reboots. I don't know if this is related.
I have Win XP Pro.

Appreciate any help

 

I found an article:

I just read it and this is what it says:
1. At a command prompt, type the following command to open Distributed COM Configuration Properties:
dcomcnfg.exe
2. On the Applications tab, in the list of DCOM servers, browse to the Machine Debug Manager entry. If this entry does not exist, type the following command at a command prompt to add the entry:
mdm.exe /regserver
3. Re-open Distributed COM Configuration Properties, click Machine Debug Manager, and then click Properties.
4. On the Security tab, click Use custom access permissions, and then click Edit.
5. Add the appropriate users to the access permissions for Machine Debug Manager. Microsoft recommends that you allow access permissions for at least the following users:
Interactive
System
Administrators
IWAM_<ComputerName>
Click OK twice to return to the Security tab.
6. On the Security tab, click Use custom launch permissions, and then click Edit.
7. Add the appropriate users to the launch permissions for Machine Debug Manager. Microsoft recommends that you allow launch permissions for at least the following users:
Interactive
System
Administrators
IWAM_<ComputerName>
Click OK twice to return to the Security tab.
8. On the Identity tab, click The interactive user to set the user account identity of Machine Debug Manager. If no one will be logged onto the computer, click This user, and then type the user name and password of a user in the Administrators group.
9. Close all instances of Mdm.exe, or restart your computer, so that these changes take effect.

When I do part 1, I dont have an application tab so cant proceed further.
When I try part 2 above, it say "Windows cannot find mdm.exe/regserver. Make sure... "

What do I do now?