Yahoo Messenger: Restrictions: This operation has been cancelled due to restrictions in effect on this computer. Please contact your system administrator.

I am using official laptop, and I am local administrator to the machine. It is our network policy that nobody is allowed to use any type of messenger from office (be it MSN, Google, Yahoo etc). So whenever I connect to office domain in the office, some policy get set in my laptop which doesnt remove automatically whenever I try to connect from outside office premises.
If I start Google Talk or Yahoo, I see following error:

This operation has been cancelled due to restrictions in effect on this computer. Please contact your system administrator.

This is quite irritating and really frustrating. Policy can be changed however, it require lot of approval process again and again. So I thought let me find solution for myself.

I was dead sure that some policy is set in Registry somewhere. I googled around and found the setting at this location:
Computer\HKEY_CURRENT_USER\software\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisallowRun

On the right side of this, I found all the entries which are actually restricted to run. Once I removed these entries, I was happy man :).

My Machine Configuration:
Dell Latitude D620, Windows 7 Ultimate 64-bit with 4GB RAM.