[SR] Lumion is taking a long time to launch.

[SR] Lumion is taking a long time to launch.

1. Question:
1.1: Why is Lumion taking so long to open?

2. Standard Reply:
2.1: Answer:

Hi,

Thanks for reaching out.

It may be that something is blocking Lumion from starting normally. Let's check the following:

1. Confirm that you have the latest Windows Updates available.

2. Let's check if you have the right exclusions in your Antivirus and Firewall software:

Follow this article:

• Knowledge Base: How do you resolve antivirus and firewall problems?

to the Microsoft site:

• External Link: Add an exclusion to Windows Defender Antivirus

Add exclusions for

1. The Lumion.exe in the Installation folder.
2. The Installation folder: usually C:\Program Files\Lumion.
3. The Lumion-Documents folder wherever that is: default Documents\Lumion 2026.

• Knowledge Base: How do you change the location of the Lumion-documents folder?

Let us know how it goes.

3. Cause/Background information:

3.1: Reference:

• https://community.lumion.com/index.php?threads/lumion-not-starting-up-or-taking-a-few-minutes.5758/