I am running this game using Windows 10, and I keep getting an error...

Failed to lead steamui.dll

All of the support given don't seem to support Windows 10...

Any advice from computer whizzes would be appreciated.

Close Steam if loaded. Navigate to the Steam Client install directory (By default: C:\Program Files (X86)\Steam) . Find SteamUI.dll, right-click and delete. Load Steam and it should automatically attempt to redownload the missing file.