Legitimate versions should only use significant CPU or memory when actively encoding a card. Constant high usage might indicate a malicious process.
Default credentials are frequently set to "Admin" with no password, though this should be changed immediately for security. Is Cardlock.exe Safe? cardlock.exe
If you find this file on a personal home computer that has nothing to do with hotel management, it may be a virus or a leftover from a previous installation. Legitimate versions should only use significant CPU or