My PC has started freezing whilst web surfing or just general using.
This has only started happening since the weather got hot,the system monitor is reading my CPU temp at 105 degrees this sounds high to me...Please any advice would be a great help.

CPU temp at 105 degrees this sounds high to me
:eek: :eek: :eek: Way too high. Check your CPU fan is it running and is connected properly, it would also be worth cleaning it if it's got a build up of fluff/ dust.
If everthing is running ok you might want to invest in a better fan you don't have to spend a fortune either - Akasa, Zalman and ThermalTake all make good ones for under £30.
As temporary measure you could always remove your case cover (if you can)