To find out what's busying up the CPU, do a C-A-D and click on Task Manager. Then tell it to show tasks from all users (details here vary depending on which version of Windows which you neglected to mention). Now click the column heading CPU and do it TWICE. This will show the busiest tasks at the top of the list. Now once the CPU gets that busy, it will heat up, so other symptoms could be the result of heat. The strange sound could be coming from a fan revving up to try to cool things down or it could be coming from a hard drive that's about to wear out. Usually they don't wear out after only a year though. Another thing about heat is that you have to periodically blow out accumulated dust - usually at least every 6 months or less.
Hello there forum ! Lately my problem is doing like a kid that doesn't want to eat his broccoli...It's very irritating... Tho I will start from the start:
So I go computer from 1 friend, he used it for 1 years, I used it for ~ 1 year w/o problems, but then it started to make strange buzzing sound (the sound itself doesn't look like natural one, it;s not like fans doing it or anything, it's more like high-pitch not natural buzzing, which is pretty much impossible to tell about), after being idle 3 or more minutes, after a while it started to shut down/restart after being idle 30+ mins and while making that buzzing sound,after even more time, the performance got worse than my old computer, then I started to shut down CPU-using programs, I looked at CPU usage it was 0-3% (of course w/o games or programs launched), by the time, it started to restart/shut down more frequently but only after being idle for some time... And so today the worst happens I launched pc, logged in, shutted down all unwanted programs and.. Damn it still lags, checked task manage again and guess what I see, no programs are using CPU, but it's 100%, RAM usage at 50% and not changing, buzzing sound is coming out even when I move mouse and so, then I started to play leagues of legends, just a game started, 3 minutes in a game: buzzing sound, I'm trying to close ALL unwanted applications, going to play and it shuts down even when I'm playing, system is not idle, ok I though, restarted computer, started the game again, boom it shuts down again... ok then I try to play a game called europa universalis 4, which, at least I think, doesn't require a lot of pc resources, just the game starts, it shuts down again... So what's happening ? Is it viruses or is it something wrong with hardware, maybe I can fix it somehow, anything more you need to know ? ESET NOD 32 shows no viruses found, which I highly doubt it...
TL:DR: No processes running: 100%CPU usage, 50%RAM usage, buzzing sound, if idle at this time, shuts down after 60 seconds, if I try to play games, shut downs immediately, ESET NOD 32 didn't find viruses
P.S Please don't say that I need to do all windows restart or all system restart if I really don't need to, as last time I asked for help with some kind of problem, they said to do fresh windows restart, then I tried to scan my pc in internet and it found the problem, so I'm really searching for solution and not message to "you need to do fresh restart of your whole system"
Sorry for my mistakes in english grammar rules...