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bastik's Avatar
German moderator
Join Date:  May 2008
Location:  Germany
Posts:  3,993
#1 | Link | What to do if KMPlayer doesn't start., Posted 01-24-2009
Case 1: You installed KMPlayer for the first time.

- Make sure that you use the latest stable version.
- Make sure that you are on an supported system and meet all system requirements.
- Make sure that the Korean codepage (C_949.nls) is in your system32 folder if you are on a 32bit system. If you are on a 64bit system this file has to be present in \Windows\SysWOW64\. (To be sure place the file in both folders)

You can download the codepage here (direct link):
for those who are not logged in: h**p://

If this doesn't solved the problem read on.

Case 2: You had KMPlayer installed before and upgraded to a newer version. or if solution to case 1 didn't work.

- Make sure that you still meet the system requirements.
- Try the old version again and report it to us if that version works.
- You've not uninstalled the previous version properly. Remove HKEY_CURRENT_USER\Software\KMPlayer from the registry and delete the folder you installed the KMPlayer in.
- Reinstall the KMPlayer to a new folder.

Read on if this didn't help.

Case 3: KMPlayer was running fine, but it stopped working.

- Maybe your system has changed and something creates a problem.
- If your system hasn't changed reinstall KMPlayer.
- Uninstall the KMPlayer completely. Remove HKEY_CURRENT_USER\Software\KMPlayer if it hasn't been removed during removal. Remove the folder you installed the KMPlayer in if it hasn't been removed during removal.
- Reinstall the KMPlayer to a new folder.
- The last thing to recommend is to reinstall windows if nothing works.

Global theoretically problems that could cause that the KMPlayer isn't running:
- Your Firewall/AntiVirus software blocks new applications (maybe without notifying you that a new application wants to run) (My firewall asks if a new application wants to run) You should add a rule that allows KMPlayer.exe
- Your computer is infected with malware that causes problems. If you check for malware and find something you should remove it. You should note that it can be impossible (in some cases) to get back to preinfection state even if the malware could be removed completely. It's a hard step, but reinstall of windows is recommended in such cases.
- KMPlayer is blocked by a windows skinning utility, shell replacement etc.

If you find an application that interferences with the KMPlayer please tell us what product it is.

KMPlayer should work and it does work, but if yours is not working please report it to us with detailed information. The more information you provide the better.

Please include at least:
- KMPlayer version
- OS (XP/Vista etc) (32/64bit) version if possible + service pack number

plus things that could help finding the problem: (note that you can never give to much information)
- Modified installations with self created installation media, (PE Builders, nlite (XP) vlite (Vista) etc)
- New Software that has been installed
- System changes
- what ever you consider as helpful (here isn't something like "to much information")
Last edited by bastik : 01-25-2009 at 12:02 AM. Reason: added download link
bastik's Avatar
German moderator
Join Date:  May 2008
Location:  Germany
Posts:  3,993
#2 | Link | understand what a codepage is, Posted 01-31-2009
Quoting Microsoft.


The meaning of the term "codepage" has evolved over time. Only one definition concerns us now: In Windows 95 and NT, a codepage is a list of selected character codes in a certain order. Codepages are usually defined to support specific languages or groups of languages which share common writing systems. For example, codepage 1253 provides character codes required in the Greek writing system.

The order of the character codes in a codepage allows the system to provide the appropriate character code to an application when a user presses a key on the keyboard. When a new codepage is loaded, different character codes are provided to the application.

In Windows 95, codepages can be changed on-the-fly by the user, without changing the default language system in use. An application can determine which codepages a specific font supports and can then present language options to the user.

Preparing for TrueType Open: saving writing system information within a text stream

When a user changes codepages, character codes from the new codepage are stored in the text stream. However, most codepages support multiple writing systems, each of which may have special rules about substituting or placing glyphs. TrueType Open will allow the flexibility for multiple writing systems to be supported by a single character set. Glyph substitution and placement rules can be associated with a writing system and stored in the font. Applications requiring these advanced features will need to save in the document an indication of the writing system in use, as well as the character codes entered.
See the inside of the codepage:
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