Windows Vista forum: "Update Has Stopped Working"

Whenever I boot up my Windows Vista laptop, I get an error message stating that "Update Has Stopped Working". Here's the detailed description of the error message:

Problem signature:
Problem Event Name: BEX
Application Name: rundll32.exe
Application Version: 2.1.0.9
Application Timestamp: 49c55947
Fault Module Name: StackHash_5bf7
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 00000000
Exception Offset: 00655d00
Exception Code: c0000005
Exception Data: 00000008
OS Version: 6.0.6002.2.2.0.768.3
Locale ID: 1033
Additional Information 1: 5bf7
Additional Information 2: d268c673088fe2286b28ddb57c366fe0
Additional Information 3: fd92
Additional Information 4: 6e2d8fec856e43d152d9821b1240186e

I have absolutely no idea what is wrong, although if it's a rundll32.exe problem I'm extremely concerned. I haven't really noticed any bad effects since this has happened; my Windows Update seems to be working fine. Any idea how to get this fixed would be greatly appreciated.

Thanks,

Jim M