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Cannot connect specific website

ConsJMEA
ConsJMEA asked
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I'm using Firefox browser with a Lenovo IdeaPad W8.1 64bits. I can navigate WWW but there are a website, only one, that I cannot connect with. Other computers using the same network can connect with this website. My computer is a dual boot system. If I start Ubuntu then I can connect also without problems. I have disabled the firewall but the problem is the same. Using IE is not solution. I've tried to reset hosts file according to http://support.microsoft.com/kb/972034 but I cannot change the name "hosts" to "hosts.old" with administrative privileges because I receive a message that the file is opened by WRSVC even if the browser is closed.
I appreciate any suggestions.
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Seth SimmonsSr. Systems Administrator

Commented:
ping the website from that system and a known-good system; do the IP addresses match or are they different?
have you tried to access with IE or chrome?
Developer
Fellow 2017
Most Valuable Expert 2018
Commented:
I don't know if resetting the hosts file will solve the problem, but here are two ideas on how to rename hosts to hosts.old: (1) Since you have a dual boot system with Ubuntu, do the rename in Ubuntu. (2) Boot Windows into Safe Mode and do the rename from there. You may need to do the rename in an elevated command prompt. There are numerous ways to get an elevated prompt. One is Start>All Programs>Accessories then right-click on Command Prompt and select "Run as administrator". Regards, Joe
Dave BaldwinFixer of Problems
Most Valuable Expert 2014

Commented:
Do you get an error message?

Author

Commented:
ping the website from that system and a known-good system; do the IP addresses match or are they different?
The IP addresses match. When I ping the address, the answer is "Request timed out" even with the computer that connects right. Both computers shows the same address and the same answer. It I use Firefox I cannot connect with my computer but I can do it with the other computer. It is right that I cannot ping the site but I can navigate the site with my browser? or this is a symptom that something is wrong?

have you tried to access with IE or chrome?
I've tried IE but the result is the same
Seth SimmonsSr. Systems Administrator
Commented:
It is right that I cannot ping the site but I can navigate the site with my browser?

yes that is possible; they might be blocking ICMP at their firewall so you won't get a response when you ping but traffic on port 80 is allowed

what happens when it does fail?  does it say the page cannot be displayed or something similar?

Author

Commented:
what happens when it does fail?  does it say the page cannot be displayed or something similar?
Only the browser says "Waiting for [website address]"

Author

Commented:
I've realized that a Firefox plugin (NoScript) may be interfering. I've disabled that plugin. I can connect with the site very slowly and sometimes the connection falls. Then I've reseted the HOSTS file in Windows Safe mode. Now I can connect without problems.
Joe WinogradDeveloper
Fellow 2017
Most Valuable Expert 2018

Commented:
Thanks for letting us know that resetting the hosts file solved the problem. I wasn't sure if it would, so that's good to know! Regards, Joe