This question was asked before HERE and HERE and was never properly answered before the site's 60 day lock out on forums occurred. Therefore, I am forced to create a new thread to answer: How do you delete Haali Media Splitter from one's computer? Although the original poster may have solved the problem, many visitor might arrive at Afterdawn, still looking for a solution. First, let me explain that I do not have a strong opinion as to the usefulness or quality of the Haali media splitter. I just notice that many people experience annoying pop-up from the Haali media splitter Windows Explorer integration and subsequently experience problems when they try to get rid of it. This could be a way to get rid of it: 1. In the Add/remove programs section of the Control panel, look for an entry Media Player Codec Pack <version>. 2. Click the Change/Delete button. The installer is started. 3. Choose Full automatic uninstall. 4. Click Uninstall. 5. Reboot when prompted to. This completely uninstalls the Media Player Codec Pack. You can choose the alternative step 3. 3a. Click Custom Uninstall and Next. 3b. In section Source Splitters & Filter, look for an entry Haali Media Splitter. Uncheck it. However, the entry for the Media Player Codec Pack will be gone from the Add/remove programs section of the Control panel, preventing future modifications and removal. Hope this helps, but: 1. I am not sure if Haali Media Spitter ships with other packs as well. 2. In my case, the steps to remove Haali Media Spitter were more elaborate. For more details, read on. This is how I managed to get rid of it. 1. I searched the hard-disk for files containing the name haali, I found "C:\Documents and Settings\<user name>\Start Menu\Programs\Media Player - Codec Pack". 2. In this location in the start menu, there was a shortcut named Haali Splitter Config. This had command-line "C:\WINDOWS\system32\rundll32.exe splitter.ax,Configure". 3. The file splitter.ax was indeed present in C:\WINDOWS\system32\ and it's properties revealed that this was the Haali Media Splitter. 4. In the Add/remove programs section of the Control panel, an entry Media Player Codec Pack 3.10 was listed. 5. I clicked the Change/Delete button. The installer was started. 6. I Chose Custom Uninstall and Next. 7. In section Source Splitters & Filter an entry Haali Media Splitter was listed. I unchecked it. 8. I clicked Uninstall. At first, the steps described above did not have the desired effect. The splitter.ax file was still present. What's more, the entry Media Player Codec Pack 3.10 was gone from Add/remove programs. 10. Since I didn't have the original installer any more, I installed the latest version, 3.9.2. I did a complete install. splitter.ax was upgraded to a newer version. 11. I attempted to provoke the annoying error message by starting Nero vision, opening an avi-file with it and navigate with the Windows explorer to that file, but could not reproduce it any more. 12. Still, I chose to completely uninstall of Media Player Codec Pack 3.9. I was prompted to reboot and did so. After that, splitter.ax had gone. Also, most references in the registy had gone. Only HKEY_LOCAL_MACHINE\SOFTWARE\Classes\ogmfile\shellex\PropertySheetHandlers\HaaliMediaSplitter and HKEY_CURRENT_USER\Software\Haali (being empty) remained. I think these can be ignored. In order to do some more testing: 13. I installed again. 14. I attempted to selectively remove Haali Media Splitter 3.9.2. After a reboot, this appeared to be successful, but still then entry in Add/remove programs had gone. Therefore, I suggested Full automatic uninstall in the steps at the top. Note: I have translated folder names and UI labels from my Dutch Windows version. I hope the English names are correct. If not, it will probably be clear what was meant.