> For the complete documentation index, see [llms.txt](https://docs.exploratory.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.exploratory.io/setup/upgrade_dot_net.md).

# Upgrade Microsoft .NET Framework

On Windows 7, old Microsoft .NET Framwork causes login to fail.

To upgrade .NET Framework, visit [this Microsoft page](https://www.microsoft.com/en-us/download/details.aspx?id=55167), download, and install the latest .NET.