Check your file called <b>HOST</b> (no extension) in <b>Windows\System32\Drivers\etc</b>. Probably it's been blocked by some softwares (eg. Kazza-lite) assigned a nulled IP (127.0.0.1) ). If it is, you can unblock it by delete the reference in the file.
Good or Bad have no meaning at all, depends on what your point of view is.
If that isn't it, you have a dns problem. Check your dns config if you are using a static ip. If you are using dhcp you might be recieving bad dns information.
If you are behind a home router your primary dns should be the router and the secondary should be your isp's dns controller. You can type in ipconfig /all at a comand prompt to see what your current primary and secondary dns is.
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