Software & Apps Windows How to Fix Steamui.dll Not Found or Missing Errors A Troubleshooting Guide for Steamui.dll Errors by Tim Fisher General Manager, VP, Lifewire.com Tim Fisher has 30+ years' professional technology support experience. He writes troubleshooting content and is the General Manager of Lifewire. our editorial process Facebook Twitter LinkedIn Tim Fisher Updated on September 22, 2019 Steamui.dll Error. Windows The Ultimate Laptop Buying Guide Tweet Share Email Steamui.dll errors are caused by situations that lead to the removal or corruption of the steamui DLL file. In some cases, steamui.dll errors could indicate a registry problem, a virus or malware issue, or even a hardware failure. There are several different ways that steamui.dll errors can show up on your computer. Here are some of the more common ways that you might see steamui.dll errors: Steamui.dll Not FoundThis application failed to start because steamui.dll was not found. Re-installing the application may fix this problem.Cannot find [PATH]\steamui.dllFailed to load steamui.dllThe file steamui.dll is missing.Cannot start [APPLICATION]. A required component is missing: steamui.dll. Please install [APPLICATION] again. Steamui.dll error messages might appear while using or installing certain programs, when Windows starts or shuts down, or maybe even during a Windows installation. The context of the steamui.dll error is an important piece of information that will be helpful while solving the problem. The steamui.dll error message could apply to any program or system that might utilize the file on any of Microsoft's operating systems, including Windows 10, Windows 8, Windows 7, Windows Vista, Windows XP, and Windows 2000. How to Fix Steamui.dll Errors Do not download steamui.dll from a "DLL download" website. There are many reasons why downloading a DLL file is a bad idea. If you need a copy of steamui.dll, it's best to obtain it from its original, legitimate source. Start Windows in Safe Mode to complete any of the following steps if you're unable to access Windows normally due to the steamui.dll error. How to Fix Steamui.dll Not Found or Missing Errors Follow these steps in order to address the various sources of problems that contribute to this error: Restore steamui.dll from the Recycle Bin. The easiest possible cause of a "missing" steamui.dll file is that you've mistakenly deleted it. If you suspect that you've accidentally deleted steamui.dll but you've already emptied the Recycle Bin, you may be able to recover steamui.dll with a free file recovery program. Recovering a deleted copy of steamui.dll with a file recovery program is a smart idea only if you're confident you've deleted the file yourself and that it was working properly before you did that. Delete the steamui.dll or libswscale-3.dll file to force Steam to replace it. You may instead need to remove a folder called "beta." If either of these DLL files is actually still present at the root of Steam's installation directory (which is normally C:\Program Files (x86)\Steam\) and haven't been deleted, try deleting the steamui.dll or libswscale-3.dll file. Then, open Steam to force it to update the program and replace the DLL file with a fresh one. If that doesn't work or if you're using a beta version of Steam, the quickest way to resolve the DLL error may be to remove the C:\Program Files (x86)\Steam\package\beta folder. This method of deleting a file or folder is only helpful if the DLL file isn't actually missing but is just not communicating with Steam for one reason or another. So, it's only useful if you have an error message like "Failed to load steamui.dll," not one that indicates that the DLL file is missing. Refresh your Steam files to repair corrupt files and possibly restore the steamui.dll file back to working order. Uninstall and then reinstall Steam, using the instructions provided in that link. Sometimes, after Steam updates or due to some other problem, an error about the steamui.dll file appears and reinstalling is the best way to go. Try your best to complete this step. Reinstalling Steam is the most likely solution to any steamui.dll error if the three ideas above don't work with your situation. Run a virus/malware scan of your entire system. Some steamui.dll errors could be related to a virus or other malware infection on your computer that has damaged the DLL file. It's even possible that the steamui.dll error you're seeing is related to a hostile program that's masquerading as the file. Use System Restore to undo recent system changes. If you suspect that the steamui.dll error was caused by a change made to an important file or configuration, a System Restore could solve the problem. Update the drivers for hardware devices that might be related to steamui.dll. If, for example, you're receiving a "The file steamui.dll is missing" error when you play a video game, try updating the drivers for your sound card and video card. Roll back a driver to a previously installed version if steamui.dll errors began after updating a particular hardware device's driver. Test your memory and then test your hard drive. We've left the majority of hardware troubleshooting to the last step, but your computer's memory and hard drive are easy to test and are the most likely components that might cause steamui.dll errors as they fail. If the hardware fails any of your tests, replace the memory or replace the hard drive. Use a free registry cleaner to repair steamui.dll related issues in the registry. A free registry cleaner program may be able to help by removing invalid steamui.dll registry entries that might be causing the DLL error. Troubleshoot for a hardware problem if any steamui.dll errors persist. While it's possible that a clean install of Windows could help, it's unlikely. At this point, the problem is likely hardware related.