Communicator 2005 won't open, keeps crashing

[Rich]

I keep getting the following error on a computer, even after uninstalling
Communicator 2005, then reinstalling it and installed the rollup patch. I
also uninstalled windows desktop search 3.0 and installed 4.0 because I
thought the older one might be causing an issue. But it still generates
these errors.


Event Type: Error
Event Source: Application Error
Event Category: None
Event ID: 1000
Date: 9/23/2009
Time: 11:16:19 AM
User: N/A
Computer:
Description:
Faulting application communicator.exe, version 1.0.559.232, faulting module
unknown, version 0.0.0.0, fault address 0x790b68be.

For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 41 70 70 6c 69 63 61 74 Applicat
0008: 69 6f 6e 20 46 61 69 6c ion Fail
0010: 75 72 65 20 20 63 6f 6d ure com
0018: 6d 75 6e 69 63 61 74 6f municato
0020: 72 2e 65 78 65 20 31 2e r.exe 1.
0028: 30 2e 35 35 39 2e 32 33 0.559.23
0030: 32 20 69 6e 20 75 6e 6b 2 in unk
0038: 6e 6f 77 6e 20 30 2e 30 nown 0.0
0040: 2e 30 2e 30 20 61 74 20 .0.0 at
0048: 6f 66 66 73 65 74 20 37 offset 7
0050: 39 30 62 36 38 62 65 0d 90b68be.
0058: 0a .