Flushing your Steam application files
You can reset the Steam application's files to rule out a few potential causes of this issue.
1.Exit Steam.
2.Open Internet Explorer, Safari or Firefox and type steam://flushconfig then press Enter. (If asked to allow this website to open a program, please click 'Allow' or 'OK')
3.When prompted by Steam to reset your configuration, please click 'OK' to confirm.
4.Once done, log in to Steam and re-test the issue.