Hi cenabit​​,

ymagalif​ is completely right, appdata\local is the cause of many delayed logon times, as this is also where everything related to web data is stored. It changed slightly in Win10 all Windows Apps are installed into appdata\local and you have to roam this folder in order to have a good user experience.  Another problematic file within this is the webcache file,

AppData\Local\Microsoft\Windows\WebCache

As this is the database is the index of anything related to WinInet, it can grow extremely rapidly (already starting life at 32MB) and can also be the culprit for logon delays. *Disclaimer* I work for a company called Avanite Limited, a VMware partner who specialises in web data and cookie management. Have a look and see if this might be something you'd like to look at! https://avanite.com/webdatacontrol