We recently ran into an issue where HOME is set incorrectly and causes issues for other users logging into the same box - https://tickets.puppetlabs.com/browse/PUP-1453

We've narrowed it down to the Git installer causing the issue. We further narrowed it down to occur only when you set the option for "Run Git and included Unix tools from the Windows Command Prompt". When you do that it sets the HOME environment variable on SYSTEM.

Would it be possible that you could set this on the USER environment variables instead?