Bala,
That happens with a lot of software installed on Win 7 Pro. Just ignore it. Or if you are game, you can disable the service.
This is an issue because Microsoft came up with this service to see if programs were compatible with Win 7.
Go to Start => Search and type "services.msc" without the quotes.
When the services window opens, search for Program Compatability Assistant.
![[Linked Image from ]](/ub/attachments/usergals/2013/07/full-4-504-services.png)
Next, right click on the service and stop it.
Right click on it again, and select Properties.
Click on the Startup Type and change to Disabled. Apply and OK.
![[Linked Image from ]](/ub/attachments/usergals/2013/07/full-4-505-pca_properties.png)
Reboot your computer, and you should be all set.
To co open Task Manager, go to services, and see if Pcasvc is gone. You may want to check prior to see the before and after.