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Error code 000000E1

Error code
0x000000E1
Type
Description
WORKER_THREAD_RETURNED_AT_BAD_IRQL

Comments

EventID.Net
From a newsgroup post: "In most cases, this kind of blue screen error is caused by the hardware or device drivers. I suggest you unplug all these hardware except the display card, then restart the computer into Safe Mode. Click Start->Run, type devmgmt.msc and press Enter. Delete the unplugged hardware items. Then restart the computer into Normal Mode for a test. If you do not get this problem, please install these hardware cards one by one to narrow down this problem."

From Microsoft (not too helpful for network administrators):
This error indicates that a worker thread completed and returned at IRQL DISPATCH_LEVEL or above.

Parameters
The following parameters are displayed on the blue screen.

Parameter Description
1 Address of the worker routine
2 IRQL that the worker thread returned at
3 Work item parameter
4 Work item address

Cause
A worker thread completed and returned at IRQL DISPATCH_LEVEL or above.

Resolving the Problem
To find the driver that caused the error, use the LN (List Nearest Symbols) debugger command:

kd> ln address

where address is the worker routine address given in Parameter 1.

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