Something is blocking DH2 from installing correctly. Please temp. disable your virus scanner/firewall then reinstall using a new installer. After installing DH2, add it to your scanner/firewall exceptions.
Don’t boot into safe mode. Most likely your windows installer was occupied or hung without you knowing about it. Just run windows in normal mode (reboot). Temp disable your firewall or virus scanner. Re-install DH2 and try again. Let us know if that works now.