Pc to TV wirelessly ?

Hi, thanks for reading.
I have my main tower unit in my office upstairs and i have countless films stored on it to which i dont want to burn off but i do want to watch them on my Tv downstairs so how can i do it with no cables (too far to route) ?
I dont really need to use the pc from the TV, just watch what i have stored on its HD.
Thanks for any advice.

Thanks NoN, some of those products are hard to find in the UK so will need to source something alike. i use the HDMI outlet of my GC for my monitor so i only have USB, VGA and DMI left so will have to check those options too.
Thanks again, any ideas on UK brands to cater for my need would be appreciated.

Thanks again Non, i looked but why does there have to be so many types lol i guess what i need now is some user experience. My office is about 15meters away from the tv as the crow flies, thats through 2 walls and a ceiling so is there anyone else out there using a particular make or device that works at this distance ?

I appreciate your views

Have a look at a D-Link DSM-510 Wireless HD Media Streamer / Player...should do the trick!!

Hey thanks Wily, didnt know what a media streamer was. I will check these out, i looked at the above one and in Amazon it hasnt got very good reviews but i see there are plenty of makes too.
I shall investigate and report back.
Appreciated

I just use my Xbox360 and WMC. Or you could use a Wii or Playstation3.
Might need some software like XBMC or TVersity.

Thanks, but i dont have a game console I might pop into PC world and just have a look see of what they have on offer.