I have a problem with the internet connection. I can connect, but then it either is very slow or I get a 500 error or the server is found only after several trials, even if having given any error. Getright downloader gives a permanent 403 error, but it is wrong because files can sometimes be downloaded in otherwise after insisting.
I think I know what caused the problem. I had Comodo firewall installed for some time, but I uninstalled because I found it too much interfering. When I installed I made the mistake of accepting the offer of their DNS server protection, and it placed their IP address number on my TCP/IP settings (at ďUse the following DNS server addressĒ). That was worse because it replaced the sites or browsers error pages with their ad and useless information. When I uninstalled, this remained. Their forum has complaints about this. I searched for remaining files from Comodo and cleared them, as well as their IP address entry on TCP/IP settings. This is all I did, maybe not enough. After this I started having the mentioned internet connection problems.
I used the OS Internet connection troubleshooter. It did not solve anything, but at the end sent this notice: The DNS server isnít responding
Your computer is trying to use a DNS server that is incorrect or doesnít exist.
Where is that setting that is incorrect or does not exist? I have a dynamic IP, but it doesnít change much. This is a single computer with a direct DSL connection.
I also tried the internet troubleshooter at MS FixIt center. No way.
Then, I used the commands ipconfig /flushdns
and ipconfig /releas
e at command prompt.
Then, following the instructions found on MS's KB-299357
for the manual method, I used the command netsh int ip reset c:\resetlog.txt
, and rebooted. No change. I didn't find any text file.
I searched MS answers forums, found one similar issue, but none of them solved. In this forum there are lots of DND cases, but none like mine. The issue remains and the OS troubleshooter keeps showing the same DNS error notice
I could reinstall an image from less than two weeks ago. That would probably solve the DNS issue, but would bring back the undesirable Comodo interferences.
How can I do to solve the issue without getting them back, please?