I tried to install Steam on my PC today, and it didn't work due to the "Failed to load Steamui.dll" error.
Of course, I tried most of the solutions on the web, such as deleting and re-installing Steam, manually removing the Steamui.dll file and/or replacing it with one on the web, but these solutions didn't work. Every time I try any of these fixes, the same error occurs.
How can I fix this?
There are no Korean-named folders in the way, if you were wondering.
I also noticed something strange: when I was trying the fix where you delete the Steamui.dll and Libswscale-3.dll files, I noticed that my Steam installation didn't have the Libswscale-3.dll, but a Libswscale-4.dll, instead. I'm not sure if this is causing the problem, but I think this may be of importance. I didn't tamper with it just in case it would cause even more problems.
In the image below are the contents of my Steam's DLL folder.
Ignore the DLL named originalsteamui - it was what I was tampering with.