I had some issues with this, although some issues may be related to a patch that recently installed the hotfix is here. Run it from a dos command prompt.

http://support.microsoft.com/kb/974571 patch that installed end of October.

hotfix: http://go.microsoft.com/fwlink/?LinkId=168248

After this is done, if still nothing happens after reinstalling communicator then try these steps.

1. Log into the computer as an administrator.
2. Right-click on the My Computer icon and select Manage.
3. In the left column, expand Services and Applications and click on Services.
4. In the right pane, locate the following services:
COM+ Event System
COM+ System Application
Remote Procedure Call (RPC)
Remote Procedure Call (RPC) Locator
5. Double-click on the service to bring up the properties and set each one of
the services to Automatic. Make sure they are all started.
6. While the properties are up, click on the Log On tab and make sure that each
of these services have the options, “Local System account” and “Allow
service to interact with Desktop” checked.
7. Click on OK and reboot the computer.
8. When the computer comes back up, click on Start > Run and type in “appwiz.cpl”.
Then click on OK.

This worked on about eight out of ten desktops. Good luck!

I never thought I would be enjoying creating scripts but I find myself into playing around with scripts at times due to the nature of my job. Here is something I can share with anyone that needs a simple script that does the job It can either be launched locally or you can use a command line function to launch it remotely.

-Open a notepad window
-Copy paste the code below
-Replace the value in the code that corresponds to your need
-Save file as .vbs
-Done

strComputer = “.”
Set objWMIService = GetObject(“winmgmts:” _
& “{impersonationLevel=impersonate}!\\” & strComputer & “\root\cimv2″)
Set colFolders = objWMIService.ExecQuery _
(“Select * from Win32_Directory where Name = ‘c:\\replacethisvalue_with_yours’”)
For Each objFolder in colFolders
errResults = objFolder.Delete
Wscript.Echo errResults
Next