Assistant none existant user

[fahl]

I have a no longer existant user keeps appearinh when using assistant,How can i get rid of it please?
User Mikef does not exist,but i may have used it previosly

 

[fredbert]

Never used Synology Assistant on Windows (virtually never on Mac), but have you tried selecting to login with the previous user and let it fail? Alternatively, uninstall Synology Assistant and reinstall it to see if that clears out cached Windows data.