Add following URL address in c:windowssystem32driversetchosts
209.85.147.109 pop.gmail.com
209.85.147.109 smtp.gmail.com
66.102.7.19 mail.google.com
209.85.225.101 docs.google.com
74.125.227.2 docs.google.com
74.125.227.2 docs0.google.com
74.125.227.2 docs1.google.com
74.125.227.2 docs2.google.com
74.125.227.2 docs3.google.com
74.125.227.2 spreadsheets.google.com
74.125.227.2 spreadsheets0.google.com
74.125.227.2 spreadsheets1.google.com
74.125.227.2 spreadsheets2.google.com
74.125.227.2 spreadsheets3.google.com
209.85.225.102 groups.google.com
74.125.127.139 spreadsheets.google.com
74.125.127.100 services.google.com
74.125.127.100 writely.google.com
74.125.127.100 sites.google.com
209.85.225.104 reader.google.com
74.125.127.101 calendar.google.com
74.125.39.99 chrome.google.com
74.125.39.99 clients2.google.com