I’ve downloaded combofix from here-> http://www.combofix.org/download.php
CIS had generated several FP’s during install.
Hello Bequick,
Thank you for reporting. We will check it out and get back to you after analysis.
Regards,
Sonia Botezatu.
Hello,
We have checked your submission.
The first file:
http://www.virustotal.com/analisis/93155ec437333c475591382261d148734f5be7a6da38d84b71cdd6464c1c506b-1253809753
is not detected by CIS 3.12.111745.560, DB 2424 heuristics set to High;
The other 3 files are not FPs and are detected as:
Application.Win32.Nircmd
ApplicUnsaf.Win32.Hide.~AB
Application.Win32.Nircmd
Files detected as Application/ApplicUnsaf represent a potential of risk due to certain factors/features provided.
More about this type of detection can be found here:
https://forums.comodo.com/false_positivenegative_reporting_is_this_a_malware_that_cis_hasnot_detected/cis_malware_naming_rules_for_potentially_dangerous_applicationsriskware-t38506.0.html;msg277700#msg277700
If you wish, you can add the files to CIS exclusion list.
Regards,
Sonia Botezatu.
The first file is still detected by CIS in my house. ;D
And the other three files…are they really dangerous?If yes, how exactly they can harm my PC?
Thanks. 
[attachment deleted by admin]
Hi bequick,
The reported file is termed as a potentially unsafe application. If you really want to continue use this file, You can add the file to the exclusion list.
Thanks and Regards,
hailong.■■■■