Why is my computer so hot?
153833
Be careful.  Get fans around it.  Your going to need a new fan, it could be tomorrow or in a couple of months, but it is about to quit.  Until you can get a new fan, get a portable fan down there to cool your system down or you could end up with "melt down".  Good luck.
640065
If it isn't your hibernation settings, then your cpu is overheating.  It can be overheating because the fan isn't spinning, but it can also overheat because of dust on the fan, causing it to turn too slowly, or even because of huge amounts of dust on the heatsink itself.  The heatsink is the large piece of copper or aluminum that sits directly on top of your cpu, underneath the cpu fan.
744801
could be a power supply or overheat issue
470944
You're so hot.  It must be those strange purple sunglasses you randomly have. *humps computer screen*
878721
could be processor overheating there is a fan on the processor which keeps it cool it could be faulty
626289
Based on the details you just provided it sounds like it is overheating and it shutdown to prevent the components from frying, literally.  Try just starting Windows normally but it sounds like you have a problem with cooling.  Perhaps some of your case fans have failed, perhaps your CPU fan failed or they just need to be cleaned.  Assuming it was a heat warning, you're going to have to take your computer apart (or at least open the case) and see if all the fans are coming on when you boot it.  If the CPU fan isn't working most likely you wouldn't have made it past the BIOS check.  At this point this is just a guess and not a very good one at that.  But as you said, it gave you a heat warning... "and talked about it" doesn't mean much to us computer geeks and you'll have to be as specific as possible.
466483
You may have fried your CPU. If only the fan was replaced, that is definitely the case. If not, some of the circuits on the motherboard may have been damaged. Basically, if you are going to repair it on your own, start from the CPU and work outward. Hard drives, videocards, RAM, etc are all very succeptibile to extreme heat.\nGood luck!
513566
It means that you left the computer running for too long or that it needs a break because it is overheating since you used it for so long. It is better for the oomputer to have a fan that blows really hard, since that would help stop overheating of your computer.
552768
If you're using a laptop, your battery is probably dying or the cooling fan isn't working properly. You'll need to take it to a shop to get it cleaned properly - don't pop the case open yourself.\n\nIf you're on a desktop, you're probably overheating, either the power supply or the CPU. You need to open the case and blow out all the dust, especially around the CPU and fans, and make sure your fans are running properly, especially on your power supply.
1158966
with that slow of a computer, there probably ins't even any heat there to generate!!! get a new computer, like the earlier guy said, u probably have a virus or ur computer died from old age.\nkeep it as a old memory\njust say goodbye to the age of the Mhz cpus and say hello to the new and very affordable 3Ghz cpus\ntons more faster and around 300 bucks including a nice 17 to 19inch flat panel LCD display!!1\n(why don't i just be an billboard for Dell, i seem to compliment them a lot on their ridicuolously low prices for rediculously good computers and monitors (mainly monitors))
1041856
this is a common problem.\n\nPC's generally heat up due to use.  Depending on the kind of laptop you have they may employ a passive cooling method (which tends to have overheating issues)  If your fan does come on that should be alright.  They make things for just this case, an example of one is the Chill Mat:\n\nhttp://www.bestbuy.com/site/olspage.jsp?skuId=6211752&type=product&productCategoryId=cat08006&id=1074788100200\n\nIf your fan stops alltogether then it may be a cause for concern.  No cooling = melting internally
601095
This may seem a bit obvious, but have you cleaned out all the dust and dirt inside of the power-supply? Or, have you ever done this...Although the outside will look clean, the inside looks like the inside of a vacuum cleaner...Use compressed air to clean out all the dust and dirt. (off the fans, memory, etc) This will help the computer get rid of heat much more efficiently...Because all the dust and dirt acts like a blanket and holds in all the heat...When the computer reaches critical temps then it will shutdown to save it from burning up...
603694
That might blow dust into your CPU.\n\nI do not think the performance of your computer is because of the fan. It is probably a coincidence.\n\nTry going into your task bar and see what else is running that might be slowing you down.
424655
As previouse answer says, most likely a fan problem.  This could either be a faulty fan, or more seriously, a faulty, overheating chip; either the main CPU or the Graphics chip.\n\nThis could be because your room has suddenly become warmer, or you have started using a more computationally intensive set of software.  If niether of these is the case; beware.  There is an increased likelyhood of crashes, if your PC is overheating under steady state conditions.
780713
The same thing happened to me on my laptop.\n\nIt is possible you are running out of resources.  However the below is what happened to me.\n\nWhat was happening is that the programs you are using are cpu intensive.  This causes the cpu to heat up.  The most likely reason for this is that the fan on your cpu is not making good contact with the cpu itself.  This means that it does not draw off enough heat. When the cpu gets hot enough it will shut the computer down.\n\nYou can get "speedfan" (goggle it) which will tell you how hot your cpu is running.  However unless you know what temperature it will scram (or shutdown) at I don't know how much this will help you.  Basically get someone to reattach the fan.  They need to get some kind of heatsink compound to attach it.
1970
A few reasons as to why this could be happening:\n\n1. Your system could be over heating, make sure none of the fans in your system are blocked, make sure the system is getting enough air flow.\n\n2. A program running at the time may be crashing when you run intensive games. Go into MSCONFIG and disable all un needed applications and restart your system (even try disabling your anti-virus at the time to see if that could be the cause). Also run a spyware scan and make sur eyou have all the latest Windows Updates.\n\n3. A bad driver such as a video driver could be the cause, check with the video card manufacture to see if there is an available update for your video card driver.
1165016
Your computer could have been heated too much.Try working on it after shutting down your pc for an hour or two.