Where can I watch Game of Thrones online for free in HD and no downloads?

[Kerigan]

I'm huge on medieval type things so I want to start watching Game of Thrones (i know, I'm a little behind bu oh well i dont really care) and I don't have HBO. I only watch TV on my laptop and Game of Thrones also is not on Netflix. I tried finding some websites online that i could use but they all either required a download, to sign up (which wasnt free), OR the quality was so incredibly horrible that you couldn't even make out the person's face. So please help >.< thanks

[Barnaby]

Hello... I don't know if it helps but I get my TV shows from tvstack.com. You need to download from there from free file hosts but the quality is very good.

[Train]

You can watch it on youtube. But I think the site I have as a source would be beneficial to you.