computer slow down after comondo internet security premium install

hello.i have a i install cis premium on my windows 7,2GB ram,2GHz and my computer is slow down.can you suggest me some tips to fix this up?thanks

Hi agnosticxv,
Do you have any other firewalls or antimalware programs running on the system?
Have you made certain that previous security programs have been removed entirely?
Uninstallers/Cleanup tools for other common security programs found here.

thanks for your reply.i have already run avast uninstaller but the results is the system hangs up.

The system being slow could be due to high CPU, following the steps found here might help in finding the cause.