After dozens of scans one morning hackerguardian decided that my 5 of my servers changed operating system from windows 2012R2 to windows 2003.
as you know windows 2003 end of life so I failed with my scan.
I open a ticket and comodo support team send me back to make sure that I don't use windows 2003
Since my servers hosting in Amazon cloud (EC2) and they not support OS windows 2003 I replay back to comodo support team that windows 2003 not supported on Amazon.
It looks that I did not convince them and they send me to check my OS with Amazon system Administrator
In short, instead of checking and fixing their bug they throw you to hell and cover the bugs with "false positive"If they can't detect an operating system I doubt if they know to identify real problems.