A nezůstalo ti po Keriu tohle?
you can manually remove the KPF driver (FWDRV) from C:\WINDOWS\system32\drivers on NT based systems or in C:\WINDOWS\system on 9x based systems. You can then remove the Kerio/Personal Firewall directory containing all KPF files.
http://www.kerio.co.uk/supp_kpf_faq_general.html