A client was receiving this error every time they logged on.
There was a problem starting C:\Users\Username\AppData\Local\ARCADE~1\CATHEL~1.DLL.
I searched the common places to try to remove this process from trying to start up and couldn’t find it.
Solved by downloading ‘Autoruns’ from Microsoft.
This is the link at time of writing: https://technet.microsoft.com/en-us/sysinternals/bb963902.aspx
If the link fails, please let me know and I’ll update the post.
It lists all the processes that startup on login and allows you to remove them easily.