IRQL_NOT_LESS_OR_EQUAL BSOD issue

1. Restart the computer.
2. Once you see the Dell logo but before the Windows XP splash screen appears, tap the key.
   The Windows Advanced Options menu appears. If this dosent works try one more time.
3. Select Safe Mode with Command Prompt or Safe Mode from the menu, and then press the key.
4. Log into the system as administrator.
5. If you are in safe mode then open the command prompt and type command which is given below. If you are in safe mode command prompt then type the command which is given below.
6. Type C: and press the key.
   The prompt changes to C:
7. Type CD %windir%\system32\drivers and press the key.
8. Type REN lvusbsta.sys lvusbsta.bak and press the key.
9. Type Exit and press the key.
10. Reboot the system and allow it to boot to Windows XP normal mode.
11. Download and install the latest Logitech QuickCam drivers from Logitech

I will try this proposed fix but will create a Restore Point first. I don't understand what Logitech drivers plays into this ?

Ya sure, Even try to unplug the external devices and reset the BIOS to default setting. Remove all the ram stick and insert one. Turn on the computer and check if you are getting the BSOD again. If you are still getting then remove the stick and insert different stick. Swap the memory sticks. If you dont get the BSOD, turn off the computer and insert the second memory stick. Turn on the computer and check if you are getting BSOD. If you get then its a problem with that paticular memory stick. Check with these steps which is have sent to you. This will resolve the problem for sure

Dell wants me to run a full system diagnostic, which I will do overnight as I need the machine during the day for business. I am not in a positon to or are willing to swap around parts to resolve a BSOD issue(s) that have been inherent on the box since I took delivery of it.  Chat Seesion Log ID # is 29380189.

I am extremely disappointed with the support that I have recieved from Dell of late regarding this issue, would I buy another Dell machine ? If Dell doesn't make me a happy camper quickly, I may never buy Dell again or recommend Dell to any of my customers.