- To check free disk space to install [more than 90GB] / free main disk space [more than 500MB]

- To quit running anti-virus applications [Please turn off Real-Time Scanning] and set firewall exceptions

- To try again after connecting directly to the LAN if you use router

- To check network settings of the places [work, dormitory, school and so on] 

- To quit checking for virus and malware / unnecessary process