alrsvc.dll - Necessary

%sysdir%\alrsvc.dll

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Description:

%sysdir%\alrsvc.dll
ALRSVC.DLL is Microsoft Windows Alerter Service.
ALRSVC.DLL provides messaging services and event alerts.
ALRSVC.DLL (Alerter service) is loaded using svchost.exe manager.
Manufacturer: Microsoft Corp.
www.microsoft.com