Hello Mojtaba,
Thank you for posting your concern on Microsoft Community forum.
I would appreciate if you can provide us the following information to help us understand the issue better.
- Is the issue specific to one website which you have mentioned or all websites?
- Are you getting any error message or error code while opening the web page?
- Which web browser are you using?
- If you are using Internet Explorer, which version of Internet Explorer are you using
You can refer to the link provided below to know the version of Internet Explorer.
Which version of Internet Explorer am I using?
http://windows.microsoft.com/en-us/internet-explorer/which-version-am-i-using#ie=ie-10-win-7
If you are using Internet Explorer you may refer to the steps provided in the following article and see if it works for you.
Cannot access some websites in Internet Explorer
You may try to run the fixit provided in the following link as it diagnose and repair ie problems that make IE slow, not secure, unstable or crash, caused by add-ons not working or inappropriate security settings.
Fix Internet Explorer issues to make IE fast, safe and stable
Hope this would help. If issue still persists post back with the information required and result of proposed suggestion, we will be happy to assist you.
Thank you.