Hello,
My PC jams very frequently, be it while opening several tabs on my browser, any noticeable software (i.e OFFICE, adobe reader, ITUNES) and while WATCHING vidoes or gaming (though not as frequently as the former two). My guess is that the more MEMORY demanding the action is, the more likely it is to get stuck and for a longer while.
By stuck I mean that the mouse cursor cannot be moved, the fans seems to be working themselves more than usual, and pretty much nothing I do stops it other than waiting; the duration is USUALLY between a good part of a second to several seconds.
I recently formatted my unit to windows 8, partially so as to remove any doubts regarding this being a software issue, obviously to no avail. I dusted everything and made sure the CPU's temperature is decent; other than that I'm pretty clueless. I use the newest and updated avast anti-virus and malwarebytes, so I don't believe it to be a virus or a malware.
What should I do?What make/model is this computer?

Have you performed a memtest with memtest86 to make sure that the memory is healthy?

Is this the same system that shows up in your spec link?