BSoD caused by cmdguard.sys (IRQL_GT_ZERO_AT_SYSTEM_SERVICE)

Hello,

Today I got two BSoDs during my regular data backup.
According to BlueScreenView, one is from ntkrnlpa.exe and another is from cmdguard.sys.
I have kernel dump file, but I don’t know where to upload it.

Any help would be appreciated.
Thanks in advance.

BSoD string: IRQL_GT_ZERO_AT_SYSTEM_SERVICE
OS: Windows 7 SP1 Home Premium 32bit
COMODO Version: Comodo Firewall 5.10.228257.2253 (Firewall / Defense+ enabled)
Other Securty Software: avast! Internet Security (Firewall uninstalled) 7.0.1466 (latest)