Synchronet BBS Software for Win32 v3.21e
This version is expected to be compatible with the following MicrosoftÒ operating systems (both 32-bit/x86 and 64-bit/x64 flavors):

•	Windows Server 2008 SP2 or later or R2
•	Windows Vista SP2 or later 
•	Windows 7
•	Windows 8
•	Windows 10
•	Windows 11
Prerequisites
This version of Synchronet requires both the Microsoft Visual C++ 2010 C run-time library MSVCR100.DLL and the Microsoft Visual C++ 2015 C run-time library VCRUNTIME140.DLL (for x86). If you do not have these files already installed on your system, you can download the installers from Microsoft: here and here.

16-bit Support
If you are installing onto a 64-bit edition of Windows and would like to enable support for 16-bit DOS programs (e.g. door games), you will need to install NTVDMx64 first: https://wiki.synchro.net/howto:ntvdmx64
Installing
This is an upgrade package. You must already have Synchronet v3.16c or later installed and should not use this installation package to attempt an original installation. Separate archives are available for original installations of Synchronet at http://www.synchro.net.

It’s possible this upgrade package might successfully upgrade installations of even older versions of Synchronet for Windows (e.g. v3.15 or before), but those upgrade scenarios were not specifically tested.
Back Up
This upgrade may overwrite files that you have created or modified, so it is very important that you back up your entire Synchronet directory tree (e.g. C:\SBBS) before continuing. Of particular interest are the files in your Synchronet exec, text, xtrn, and webv4 subdirectories (and all subdirectories within) as well as the individual file ctrl/text.dat.

Diligent use of the Synchronet mods subdirectory (for modified scripts and display/menu files) and the ctrl/text.ini file (for modified text strings) can help alleviate concern you might have about losing any customized files during a Synchronet upgrade. This upgrade will not overwrite your existing Synchronet data or configuration files.
Licensing/Registration/Donations
Synchronet is free software covered under the GNU General Public License. No registration or licensing fee is required. See http://synchro.net/copyright.html for details.

The author/maintainer (rob@synchro.net) has a PayPalÒ account for accepting voluntary monetary donations.
Source Code
Synchronet is an open-source development project with complete anonymous public access to the full C/C++ source code. See http://wiki.synchro.net/dev:index for details.

Thank you for your continued interest in Synchronet BBS Software,

Rob Swindell, http://wiki.synchro.net/person:digital_man
.