To eliminate the chance that AntiVirus, AntiMalware, and other security-related software cause corruption or lock up files in the Qlik environment, or cause issues during an installation/upgrade/patch, some folders should be excluded from live scanning.
Impact of Virus/EDR/ATP scans locking Qlik related files (such as .qvw files, binary Qlik Sense app files as well as NPrinting task files, etc...) can result in loading and refresh failures as well as performance issues.
In Qlik NPrinting's case, these issues can be caused by:
locked or quarantined NPrinting system files
deleted NPrinting system files
Please note that usual anti-virus exclusions might not apply to the EDR and ATP setup, talk to the vendor to get the exclusions in place.