I keep having problems?

Almost every time I turn on my computer, it goes to a blue screen that says error and I have to restart it a few times before it starts windows normally. Also after being on for awhile it starts to act extremely slow. Sometimes programs encounter errors and have to close, I thought it had to do with low memory but I still have something like 11 free gbs. Then I thought it was a virus but I got about 3 different reliable antivirus and adware programs which found nothing. what could it be??????

I keep having problems?nortin

Well I would just go in and reformat the computer.That will put it back like it was when you got it from the store.The other thing that I would check is if you have never blowed the computer out you might need to do this dust will cause the computer to overheat and act up on you to just shut it down and pull the side cover and buy a can of air unplug the computer and blow all the dust out of it see if that helps it any.then start it up and run a scan disk on it and then def rage it also this will help speed it up.if that does not work for you just reformat it and it should be good.

I keep having problems?pc security

you may want to contact the company you bought the computer from! sounds dangerous! good luck
Take it to computer shop, fan needs to be replaced,processor overheads.
Put the exact error message into google search.

Buy a new stick of matching RAM.
that's the dreaded blue screen.... it could be a number of things your computer could be over heating, there could be faulty hardware or the hardware might not be installed properly..... and for the memory side of it I think your looking at the wrong part.. the memory to run your PC is the RAM (Random access memory) not the hard drive memory :)