UPGRADING FROM 2.3-ALPHA1 AND EARLIER
 
 OpenVPN Windows installer went through major changes in
 2.3-alpha2. To avoid any unexpected behavior, it is strongly
 suggested to upgrade as follows.
 
 First backup configuration files and certificates from your
 current installation; by default they're in
 
     C:\Program Files\OpenVPN\config (32-bit Windows)
     C:\Program Files (x86)\OpenVPN\config (64-bit Windows)
 
 After this, stop the openvpn-gui or the openvpn service
 wrapper, if either of them is running and uninstall OpenVPN.
 Finally, remove the OpenVPN install directory entirely (e.g.
 using Windows Explorer as administrator).
 
 Finally, install the new version of OpenVPN and copy over
 your configuration files and certificates, which now go to
 
     C:\Program Files\OpenVPN\config
 
 provided you did not install the 32-bit version on 64-bit
 Windows.
 

 IMPORTANT NOTE FOR WINDOWS VISTA/7 USERS

 
 Note that on Windows Vista, you will need to run the OpenVPN
 GUI with administrator privileges, so that it can add routes
 to the routing table that are pulled from the OpenVPN server.
 You can do this by right-clicking on the OpenVPN GUI
 desktop icon, and selecting "Run as administrator".
 
 GENERAL QUICKSTART FOR WINDOWS

 The OpenVPN Client requires a configuration file

 and key/certificate files. You should obtain
 these and save them to OpenVPN's configuration
 directory, usually C:\Program Files\OpenVPN\config.

 You can run OpenVPN as a Windows system service or by using
 the client GUI. To use the OpenVPN GUI, double click on the
 desktop icon or start menu icon. The OpenVPN GUI is a
 system-tray applet, so an icon for the GUI will appear in
 the lower-right corner of the screen. Right click on the
 system tray icon, and a menu should appear showing the names
 of your OpenVPN configuration files, and giving you the
 option to connect.

 
 BUILDING OPENVPN FOR WINDOWS
 
 Official OpenVPN Windows releases are cross-compiled on Linux using the
 openvpn-build buildsystem:
 
     https://community.openvpn.net/openvpn/wiki/BuildingUsingGenericBuildsystem
 
 First setup the build environment as shown in the above article. Then fetch the
 openvpn-build repository:
 
     git clone https://github.com/OpenVPN/openvpn-build.git
 
 Review the build configuration:
 
     openvpn-build/generic/build.vars
     openvpn-build/windows-nsis/build-complete.vars
 
 Build (unsigned):
 
     cd openvpn-build/windows-nsis
     ./build-complete
 
 Build (signed):
 
     cd openvpn-build/windows-nsis
     ./build-complete --sign --sign-pkcs12=<pkcs12-file>\
     --sign-pkcs12-pass=<pkcs12-file-password> \
     --sign-timestamp="<timestamp-url>"