That is telling you the file is set to "Read Only". Now you
know something is up, because that file is not read only by default...
I'm going to give you another command to copy and paste in the same place as before..
attrib C:\Windows\System32\drivers\etc\hosts -s -h -r
This will remove hidden, system and read-only status.. Allowing you to do whatever you'd like with the file now. Then repeat the instructions above.
Next, you may want to run a free anti-spyware program like spybot (
www.safer-networking.org) or ad-aware (
www.lavasoftusa.com) to make sure there's no malware on your system. I also recommend a free online virus scan from
http://housecall.trendmicro.com/, which will require you use Internet Explorer... Just to make sure there's nothing nasty on your computer playing with your hosts file.
It doesn't have to be a malicious program either... Some spam blockers and firewall softwares (Spybot even has this feature) will make addition entries in the hosts files. Maybe it got mixed up somewhere along the way and blocked sites you use.
Oh, and the reason I'm giving you commands is to avoid any confusion over having to enable hidden files etc... It's probably easier & faster for you to copy and paste anyway.
. But, you are perfectly welcome to do this maually if you'd like.