Why does my laptop keeps freezing?

[Yupxxxxx]

I got this Fujitsu laptop not even a year ago. It keeps freezing when I try to access certain sites (tumblr, twitter and several other random pages) and there's no other way to get it to run unless I turn it off with the off button and turn it back on! It happened a week ago as well but I managed to fix it when I got so impatient I just slammed the keyboard and it managed to go back to normal again.....however, it was only fixed for about 3 days and now it's back again! It's worse this time too, more webpages seem to freeze it and in an hour I could have to restart it over 15 times!!!

There doesn't seem to be a virus on my laptop (I did an AVG scan) and according to troubleshoot there's no problem with my internet!!!

Does anyone know what may be causing this and possibly how to fix it??? I have assignments due this week and several of the webpages I need won't work!!!

[Owen]

Too much porn. Maybe you need to update your pc? Also u can do a disk defrag.

[Cricheque]

Usually it's because a driver is corrupted or needs updated. Try this solution here it helps
http://www.youtube.com/watch?v=6oK_eBY2S2k

[Ananthu Presanth]

Keep it in the corner of a room. It's 90 degrees. It will unfreeze.