Link to issue number:

None, related to #12064

Summary of the issue:

Python 3.8 introduced changes to the way in which dll's are loaded on Windows. This however does not work on clean installs of Windows 7 - a specific update needs to be installed.

Description of how this pull request fixes the issue:

User guide has been updated to mention that on Windows 7 SP1 KB3063858 has to be installed. I've mentioned KB3063858 specifically rather than KB2533623 which is mentioned in the Python issue above as KB3063858 replaces it and KB2533623 can no longer be downloaded from Microsoft servers anyway.

Testing strategy:

Manual testing:

• On my main fully uptodate Windows 7 box ensured that latest build from Py3.8: Transparently use a Python virtual environment under the hood #12075 starts correctly.
• On a clean install of Windows 7 SP1 tried the same launcher, ensured that it initially fails, installed KB3063858 and ensured that after it is installed NVDA can start.

Changes like these cannot be unit tested and we don't have system tests running under Windows 7.

I've also compiled user guide and ensured that it displays correctly.

Known issues with pull request:

I haven't tested specifically on Server 2008 R2 but since it is based on the same sources as Windows 7 I don't expect any troubles here.

Change log entry:

None needed - Python 3.8 is not in a release yet.

Code Review Checklist:

This checklist is a reminder of things commonly forgotten in a new PR.
Authors, please do a self-review and confirm you have considered the following items.
Mark items you have considered by checking them.
You can do this when editing the Pull request description with an x: [ ] becomes [x].
You can also check the checkboxes after the PR is created.

• Pull Request description is up to date.
• Unit tests.
• System (end to end) tests.
• Manual tests.
• User Documentation.
• Change log entry.
• Context sensitive help for GUI changes.