Antivirus & Endpoint Security
Endpoint protection errors, installation and uninstall failures, and management consoles.
55 articles
2753
Trend Micro will not uninstall: removal tool errors and stuck components
Trend Micro error 2753 leaves components registered and blocks removal. Here is why uninstall stalls and how to strip the…
Unable to connect to the Service
Malwarebytes unable to connect to the service: the app opens but does nothing
Malwarebytes Unable to connect to the Service means the background service is stopped or blocked. Read the cause and the…
Runtime Error 0
Malwarebytes Runtime Error 0 and error 502 during install or upgrade
Malwarebytes Runtime Error 0 appears when setup cannot write or register its components. Here is the cause and the clean…
1921
Malwarebytes real-time protection keeps turning itself off after a restart
Malwarebytes error 1921 means the protection service will not stay running. See what stops it and why Free builds never…
0x80070643
Windows Defender update error 0x80070643: security intelligence will not install
Defender error 0x80070643 blocks security intelligence updates and leaves detection stale. Here is the real cause and the fix that…
ACT.11
ESET error ACT.11: this licence is already used on the maximum devices
ESET reports an overused subscription: more devices use it than allowed. Here is how to free a seat, and the…
0x80072EE2
Microsoft Defender error 0x80072EE2: definition downloads time out every time
Defender error 0x80072EE2 means definition downloads never complete over your connection. Read which layer blocks it and how to fix…
ACT.1
ESET activation errors ACT.1, ACT.3 and ACT.8: what each one actually reports
ESET ACT.1 is not a rejected key: it reports activation completing with an error. See what ACT.1, ACT.3, ACT.8 and…
0x800106BA
Microsoft Defender real-time protection will not turn on: what 0x800106BA really is
0x800106BA is a legacy Windows Defender code. On Windows 10 and 11 the same symptom is disabled mode or event…
ECP.20001
ESET error ECP.20001: activation server cannot be reached from this network
ESET error ECP.20001 means activation traffic never reaches ESET servers. Here is which network layer blocks it and how to…
0x80508023
Microsoft Defender error 0x80508023: the threat was no longer there to remove
Defender 0x80508023 is ERR_MP_THREAT_NOT_FOUND: the item had gone, or malware is blocking the scan. Here is what Microsoft documents and…
0x1106
ESET update failed with error 0x1106: modules and detection engine stall
ESET error 0x1106 stops module updates and leaves detection stale. Read what triggers it and the upgrade path that fixes…