System slow down/instability Windows 7 64 bit System

Hi, I just installed CIS 3.13 Version 3.13.125662.579 without the antivirus option on a Windows 7 64 bit system that is new and clean. System hung on reboot and would not shutdown. Browsing the Internet was very slow. Added a rule for windows update and update was extremley slow. Some pop ups that comodo normally comes up with turned blank and system hung. Comodo was the only software on the PC other than Windows 7. Uninstalled comodo, pc is fine now and back to normal. I used Comodo before and have had success with it on Vista but not on Windows 7. Any help would be appreciated.

I had installed Comodo Windows 7 64bit in a virtualbox for testing purposes on a clean system and had some of the issues you describe. I reset the machine twice and eventually Comodo worked. But you could try to install an older version and then, from inside the firewall (tab miscallenous) do an update to the latest version. This is most certain to work