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Add an exclusion to Windows Security

If Windows Security has incorrectly flagged SigmaXL as untrusted, SigmaXL can be added to Windows Defender's exclusions list.

A common symptom of this is the The following error message when starting SigmaXLthe add-in is a common symptom of it being blocked:

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Click (1) Windows Security > (2) Virus & threat protection:

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In Image Modified Virus & threat protection settings, select Protection history to view the blocked actions: Each item in the list can be clicked to expand and to review if SigmaXL/Excel is being blocked by Windows security settings:

Under Virus & threat protection settings, select Manage settings:
Scroll down to Exclusions and click Add or remove exclusions:
Click (1) Add an exclusion, and select (2) File:
Navigate to the SigmaXL folder, select SigmaXL.xlam and click Open.

For 32-bit: C:\Program Files (x86)\SigmaXL\{version}\SigmaXL.xlam:

For 64-bit:C:\Program Files\SigmaXL\{version}\SigmaXL.xlam:
SigmaXL is now being excluded from Windows Defender