If you get the Locked Order Number error please follow the installer prompts. That's the only way to get an Order Number unlocked.

Soulutions for MSFS2020 Error 29 and the Error 24.

IF YOU GOT NO INSTALLER ERRORS BUT EXPERIENCE ANTIVIRUS ALERTS AND/OR LIMITED SOFTWARE FUNCTIONALITY PLEASE READ THIS.

If you cannot run the product's installer exe file at all and/or suspect the download is corrupted: re-download the product.

A. If you get an Installer Error which does not prompt you to proceed to any direct solution form,
try complete re-install of the product.

B. If you get product Activation error:
1. Make sure you are using a correct Order Number, which is NOT a transaction ID.
2. Make sure your AV including Windows defender is OFF.
3. Read a true story of a man who thought he did the #2 right. In fact he didn't.
4. Try offline activation.

C. If it's the 757 CAPTAIN III you can try Manual installation

Please note that we do not support 32-bit sims anymore