Depends on connection.
If you have a HDMI slot on your TV and your PC use a HDMI cable straight up.
If your TV supports DVI then use a DVI cable as your PC will definitely have a DVI port. Then you will need to set up your sound through a different output as DVI does not support sound.
The other option is VGA which your TV is unlikely to support.
Probably the most expensive option is a HDMI to scart converter with a built in upscaler. Obviously, if your PC has a HDMI slot and your TV only has scart sockets this is the best option.
HDMI to HDMI is the best option buy far and is the easiest and will give the greatest picture.
As for wireless transmission through any data communication type there will always be distortion or a chance of interference which is why I prefer wired setups for TV, music, gaming, etc.