Av-protect.com and av-command.com are two identical websites related to widely spread fake antivirus program called Antivirus Soft. These websites don't host harmful files or at least don't provide download link, but should be still avoided. Av-protect.com just like av-command.com provides false information about the rogue program and tries to convince you into purchasing the full version of the program. Basically, Av-protect.com is a pay page of Antivirus Soft. If you constantly see any of these sites on your screen then your computer is probably infected with Antivirus Soft virus. In such case, you should use legitimate anti-malware or anti-virus software to remove the infection and to block those malicious websites. For more information please read Antivirus Soft removal guide.
Screenshot of av-protect.com (av-command.com looks the same)