Comodo Personal Firewall - system restart

During the installation of Comodo Personal Firewall, my PC equipped with Windows Vista Home Basic (32 bits) is required of restarting. However, my system has been hanged and is not restarted normally. I have to power off and on manually. Appreciate it much if some remedial action will be taken on the setup software itself.

same problem on my vista home premium.
after rebbot I had to power off and deinstall in protected mode