My computer keeps freezing and i have to turn it off at the back and reboot it.sometimes it can go days without doing it other times its every hour

Go to control panel and check you power saver settings. It's probably set to turn off the monitor after a few hours.

I think your system facing heating problem. contact with any technical person. he put some paste b/w fan and processor.

turn off you playstation....then turn it back on to where the red light comes on (standby) then hold the power button til it beeps 3 times....it should turn on and back off durin this time....then repeat that process again and a screen should pop up and it asks you if you would like to restore playstation or rebuild database....try the rebuild database.... (it will delete everything saved on your playstation and it could take hour to rebuild it) if that doesnt work then yoyu have a faulty blue ray lens

Possibly you have a programme running in the background that is causing the freezes, could be a screensaver. i think at sometime microsoft will issue an update that will fix this problem.

I dont thing this is a virus problem but a heat problem. if you dont mind getting inside the box see how clean it is and put your hand on the power box case .. then unplug all the hardware except the mother board then turn the unit on, if it goes on then plug 1 hardware at a time.

this problem occurs if your computers cooling is not as its necessary to be.try useing it with an open cabinet and see if the problem persists. if the problem still persists remve ur CPU fan and place some heat sink fluid and place it back on the cpu. then all your problems should be gone.
use a good antivirus to check for any viruses before this(just in case)

check the viruses in your system why freeze that... if the same problem after that try to reinstall the os

check another parts

LET THE BATTERY DIE OUT .. IT';LL TAKE I GUESS ABOUT ONE DAY TILL IS COMPLETELY DEAD THEN EVERYTHING IS GOING BE NORMAL..TRY NOT TO RUSH CLICKING BUTTOMS TOO FAST OR DELETE STUFF FROM YOUR MP3 INSTEAD FROM THE COMPUTER.

You can start by uninstalling the program you installed before this started happening. You can also do system restore which you'll find in start>accessories>system tools.
If nogo, try disconnecting devices on the back of the computer except the keyboard, mouse, monitor and power. Turn the computer on without them. If the issue disappeared, reconnect what you unplugged one at a time until you find the culprit.

get a new TV :)