When i net surfing, i got some problem on my PC. When i logged in to big site like gmail.com, twitter.com and any on other website put username and password then show the "This connection is Untrusted". Then i click on the "I understand the risk" and doing next work. So Please tell what is this, is this serious problem for my PC...............
May be the ssl certificate of the website is out of date, or may be there is some virus problem. It may also be possible that your firewall is disturbing the browsers to use that sites!
The time in your PC do not match the real time. I suggest you go to the control panel and change the time according to real time. Or you can change it on your BIOS.