Driver IRQL Not Less or Equal - Blue Screen - Sierra 875U card

Contributor

Driver IRQL Not Less or Equal - Blue Screen - Sierra 875U card

I kept getting these and then they became quite frequent.
I just bought a refurb IBM thinkpad T42P running XP.
 
I have installed very little software and then the Sierra 875U (USB) card. 
 
A service store thought it was the HD - although I ran the diagnostics and did not find any issue with this component.
I have also ran the PC - stressing it while on the wired network and it does not crash. 
This leads to a high probability it is an interrupt level conflice with this USB device. 
 
I have tried to disable the non-wireless network adapters and modems.
I have tried updating ATT Communication manager.
 
I tried to change the IRQ level for the 875U / adapter or anything with Sierra but cannot find the IRQ level for this. 
The closest thing is the IRQ for the USB component.
 
I am lost and not sure what to do.  
Please advise
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Message 1 of 3
Guru

Re: Driver IRQL Not Less or Equal - Blue Screen - Sierra 875U card

You problem is likely caused by the 875U device driver software. Try uninstalling at&t or Cingular Communication Manager, reboot then install Sierra Wireless's 3G Watcher instead. After the software is installed, then plug in your 875U.

http://forums.wireless.att.com/cng/board/message?board.id=pccards&message.id=8644

http://forums.wireless.att.com/cng/board/message?board.id=pccards&message.id=7764

http://www.sierrawireless.com/support/cingular/ac875U_NB_ENU.aspx
Message 2 of 3
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Contributor

Re: Driver IRQL Not Less or Equal - Blue Screen - Sierra 875U card

It worked.  Its been running for a few hours without any crashes. 
THANKS!
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