Can't log few websites

If you are still getting the same error then you will need to do some tweaking in DNS Settings which i will show you in just a bit. First let me tell you that this requires you to Make some Changes in your DNS but these changes seems to work and helps to get rid of of Error Code DNS_PROBE_FINISHED_NXDOMAIN.

Step 1: Right Click on the Network Icon in your Taskbar, then Click on Open Network and Sharing Center.
Step 2: A Window will open up, On the left Pane, Click on Change Adapter Settings.
Step 3: Now you will see all the Network Connection but you will have to identify which is active and connected, It can be LAN or Wireless Connection. You will have to Right Click on the Active Connection and Click on Properties.

Continues in next post…

I am using Google Chrome browser. Recently I find the security padlock at left of the address bar is partially covered with a small yellow triangle while loging in onlinesbi.com website. The addressbar is also not turning blue to indicate secured login.
Please help and advise. Thanx 

This webpage is not available. The server at www.wbtdc.gov.in can't be found, because the DNS lookup failed. 
DNS_PROBE_FINISHED_NXDOMAIN

Above are the few comments I get when try to log in some websites  viz

www.wbtdc.gov.in ; portal.uidai.gov.in etc. 

I am using AVG Zen. Is it because of firewall interference?
Please suggest how I can log in such important sites.
Thanks

Hello Ashutosh. May I know which web browser are you using to access those websites?

I am using Google Chrome browser. Recently I find the security padlock at left of the address bar is partially covered with a small yellow triangle while loging in onlinesbi.com website. The addressbar is also not turning blue to indicate secured login.
Please help and advise. Thanx 

Hello Ashutosh, thank you for the reply. This error occurs mostly in Google Chrome web browser because DNS lookup Fails When you try and access the Webpage whilst you can easily access any web page on Mozilla firefox or IE. It is also Important to Keep your Windows PC Clean and Optimized, As said times and times again, Various Errors Occurs because of Corrupt or Unorganized Registry Files and System Files.

As This Issue Occurs because of DNS, Please follow the below steps:

Step 1: Press Windows Key + R to open up Run dialogue box
Step 2: Type in CMD and press enter to Open up Command Prompt
Step 3: You will see Command prompt is now open, Now Simply Type this command (netsh winsock reset catalog) without the brackets and press enter.
Step 4: Once the Above Command is Executed, Now Reboot your PC if you want or try to open the same web page what was showing you the error. There should not be any issue now.