There's a few good websites, my favourite is www.surfthechannel.com, it has most shows and nearly every episode of them. No downloading of anything. Most of the episodes are also on fanpop, just type in the episode name of season number and episode number, and u should get a few linken of videos for them.
this then directs me to a website, with a link for supernovatube. when house starts playing on the screen, i then download it via the veoh toolbar so i can save it and can watch it offline and whenever i want :D
its the best in my opinion, and no viruses for me :)
Also, lots of people post great linken to episodes right here in the House MD Spot. There are always a few of us that will go through the linken that are geplaatst here checking for spam. However, when we find good linken to episodes, we rate then highly and usually leave a commentaar saying that it is good. Bad linken will be rated low and have a commentaar about why it is bad (ie survey, downloads required and so on). So u will always be able to get a good link to an episde here at the House MD Spot.