Windows Install Instructions & Common Problems

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Windows Install Instructions & Common Problems

Post by xX.jongames.Xx »

On homepage of denMS, click the button: Image

This will take you to google drive for the "" download (Warning: Download is large at 1.7 GB and only supports Windows)
After downloading, extract the zip to your preferred location. In order to start the game you run "denmsclient.exe"
If any errors or warnings pop up, hit ignore or continue.

This is what you will see at first, it is the auto-updater:
warning2.png (23.31 KiB) Viewed 31598 times
WARNING: If this command prompt / terminal window is closed before it finishes (it will launch the game automatically when it is done), or if it is launched twice in succession, it will break the game.
So do not accidentally run "denmsclient.exe" twice or close anything until the game has started.

You may have to allow the files "denmsclient.exe", "denmsclientHD.exe", "denmsclient\SKEL\2f932b50de956533b47177b00af6a3b5d5ca72ea\denmsclient.exe", and "denmsclient\SKEL\c1e9433f5159b4125ae6f6e84e2cf4d03a5ec89a\denmsclientHD.exe" through your firewall in order to connect (also check the homepage to make sure the server is currently ONLINE).

If you are running Windows 8 or 10, you may need to enable compatibility mode! Windows XP, Vista, and 7 should work without this.
Go to your extracted folder and right click "denmsclient.exe", click 'Properties', and then click the 'Compatibility' tab. Tick the box to 'Run this program in compatibility mode' and choose the option: 'Windows 98 / Windows Me'. Also enable 'Disable display scaling on high DPI settings' and 'Run this program as an administrator'. Finally hit 'Apply' and 'OK'.
If these tips don't resolve the problem, you can follow the Mac & Linux instructions here as those also work on Windows.

NOTICE: VirusTotal and other antivirus will flag "denmsclient.exe" as a virus and delete it. This is not true and is due to a lack of digital signature on the game client.
Information from a reputable forum on game development explaining that these are not viruses: ... st-913011/ ... st-811914/ ... s-1075290/
Link to original file comes from another reputable website.
IF your antivirus deletes the "denmsclient.exe" file which is required to run the game, instead of forcing you to re-download the really large ZIP file, you can click the button: Image which is a much smaller download. You must place it in the original extracted folder and rename it to "denmsclient.exe"
Please add an exception in your anti-virus software for this file and try again.

Error Codes:
(Unspecified error)
Check the refresh rate of your display monitor. MapleStory requires 60 Hz refresh rate. MapleStory will NOT work if your monitor is set to 59 Hz.
Make sure DirectX is updated to the latest version and your graphics drivers are updated and correct.

Runtime / DLL error
Install / update VCRedist 2010: ... px?id=5555

.NET Framework error
Install / update .NET Framework 4: ... x?id=17851

If the game never even gets to the auto-updater command prompt / terminal window and it gives an error, then you may need to delete the "" file within the denmsclient directory.
To enter fullscreen and/or return to windowed mode: Press Alt+Enter

If you have any other problems, you can register to use this forum and create a NEW post asking for help.
Last edited by xX.jongames.Xx on Wed Jan 29, 2020 9:48 pm, edited 1 time in total.