Cisco VPN Anytime Connect DLL problem

Over the past week, my Cisco Anytime Connect client started to behave funny.  Mostly it won't connect to the server at start up.  I had to click "quite" twice to close it, then started it again, when it usually would work.

Then it happened on Monday that it just wouldn't connect to the server.  Just hang during trying. 

I decided to uninstall it and reinstall it. 

What a bad idea. 

After uninstall it from the Control Panel, it won't install again either using an old installation file or new installation files just downloaded from our IT site. The error message is:

 "There is a problem with this Windows Installer package. A DLL required for this install to complete could not be run. Contact your support personnel or package vendor."

Search online didn't give me any good results.  Our IT guy said that this may because I had Java 7 installed.  Although I don't believe him, tried it anyway.  After downgrade to Java 6, same error message.

Damn.

Then our IT guy suggested that I reinstall Windows. What a Bxxxxxxx.

I decided to try it on my own.  First, create a new administrator account.  Then use this account to install. 

It worked! 

When log back to my own account, Cisco AnyConnect is already there and working!