---
title: ".NET 3.5 - Issues with activation"
canonical: "https://servicedesk.maxgeo.com/space/LC/1263370273/.NET%203.5%20-%20Issues%20with%20activation"
format: markdown
---
*.NET 3.5 is required by LeaseControl's Report Designer module, and can happily co-exist alongside other .NET versions.  .NET 3.5 is therefor required to be installed and activated on computers hosting the LeaseControl software.*

Although some basic information is provided following, this falls into IT Support rather than Technical Support.  We therefore ask that you ensure suitably qualified and experienced IT personnel evaluate the suitability of the below information.  If further assistance is required please contact [sales@maxgeo.com](mailto:sales@maxgeo.com).

<u>**Symptom:**</u>

1. .NET 3.5 is installed, however the usual process of activating it does not work.
2. Microsoft errors: <span style="color: #ff5630">0x800F081F, 0x800F0906, 0x800F0907 or 0x800F0922.</span>

<u>**Cause:**</u>

- <u>Techies</u>: It may be that your Group Policy is affecting the Windows installation (in which case refer to **Solution 1**) or (if you getting error <span style="color: #ff5630">0x800F0922</span>) use the DISM command to enable .NET 3.5 (refer **Solution 2**)
- <u>Non-Techies</u>:  There's a problem with some installation packages that causes .NET 3.5 components to be installed... differently.  That is: in a way that gives IT a headache.

<u>**Solution:**</u>

1. Modify your Group Policy.
2. Ensuring you have the Windows ISO image on CD and at hand, run the command prompt as an administrator and enter the following, replacing **[DRIVE] **with the drive the ISO is located on.  For avoidance of doubt: Retain the spaces as stated.  <span style="color: #4c9aff">dism /online /enable-feature /featurename:NetFx3 /All /Source:</span><span style="color: #4c9aff">**[DRIVE]**</span><span style="color: #4c9aff">:\sources\sxs /LimitAccess</span>