A: You will see this error when you attempt to start one of our programs. There are several variations of this message which can only occur on Windows XP, 2000, or NT operating systems, not on Windows 95, 98, or ME. If you search on Google for "16-bit subsystem error" you will find more than a hundred thousand references to it. The articles on the first page or so directly address this issue.

Apparently the problem is being caused by some program, probably a virus, worm, or adware program, erasing one or more special files needed to run DOS (including our programs) or 16-bit windows programs. The immediate solution is to replace the damaged files. Microsoft's solution is to re-install the missing files manually from your windows CD which is somewhat high tech for most people -- especially since many new PC's don't come with a windows CD.

Solution: We have bundled the three files involved into a self extracting Win-Zip file and each of the files is write-protected so the mal-ware program cannot delete the files again the next time you restart your computer. If you have XP or XP-Professional, run this program, 16bitprb.exe from your computer, then click ok, and it will install the three files in your Windows\system32 folder. You will have to click through all of the security warnings from windows in order for the files to be installed. Be sure to read the warnings and answer with the proper clicks to permit the program to operate.

NOTE: Windows NT and Windows 2000 users. Change the folder name before unzipping to: winnt\system32 instead of windows\system32.

Please read this informative article about how to fix the 16-bit subsystem error, for more information.

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