High CPU usage when running games/programs?

This is my first time posting onto this website. I ran into a problem last night after I restarted my computer, where any game that I start or even slightly intensive program I open, my CPU usage raises from ~14% to ~100% instantly. I have tried this on many programs such as Minecraft, any games on Steam, Firefall, and even some of Malwarebytes when I was scanning if a virus was causing this. None of my anti-virus software detected a virus, so I'm suspicious as to what the problem may be. Here are my computer specs:

Processor: Intel(R) Core(TM) i5-3550 CPU @ 3.30GHz (4 CPUs), ~3.3GHz
Graphics Card: NVIDIA GeForce 8800 GT
Memory: 8192MB RAM
OS: Windows 7

Request any extra info if needed.

Ihascupquake minecraft world

Hi i'm on a mac and i downloaded the ihascupquake oasis map but it does not give me the save it gives me a bunch of random files Please Help!

I need advice for youtube?

I have been making videos twice a week for 3 months. And I have 9 subscriber 3 being my friend and his 2nd account and his school account… No I don't know why he subscribed to me with his school email account, I told him not to. Anyway I'm only reaching like 5 views per video and I do have a description, tags, and good titles. As well as thumbnails. Also my videos are all super high quality. I DO NOT WANT TO SAY MY YOUTUBE USERNAME BECAUSE I DON't WANT IT TO BE CONNECTED TO THIS ACCOUNT IN ANY WAY. But does anyone have any advice of how I can get ppl to find my channel. If this helps I post minecraft videos.

Minecraft is not responding?

I just bought the redeemable code for minecraft pc in gamestop. I have it downloaded and I have the 1.7.9 update. But when I create the world and it loads, It says minecraft not responding.

Any advice for a first time pc gamer?

How to would like to create a game like Runescape?

I'm from the UK and am in year 9, I would like to make an attempt at a game like Runescape. I have everything planned out from the world to NPC's to the weather classes, races etc. I have taken computer science at school and am excelling brilliantly. I'm learning python and java, have mastered just basic and am an intermediate at HTML. Please do not leave reply's saying I will fail dismally and if so I would like a little partner that could tag along with me and try to make this thing. Please answer soon and if you would like to contact me my email is james-donovan@live.co.uk. Thanks in advance.

I should also add that I shall hopefully be making "models" in minecraft as a little draft and would need help with that as well

Can't keep myself out of trouble at school?

I have ADHD and I just can't behave at school. For my bad behavior last year I have been given a 90 day probational period meaning if I do something bad during that time I get expelled. I feel really bad about myself and I have a reputation of acting stupid at school. I'm a relatively smart kid academically and I don't want to be expelled. I need some helpful tips and guides please give thorough answers. Thanks

About me:
Love minecraft
13 years old
Rising 8th grade
USA

What kind of Nvidia graphics card should I get?

I need to get a graphics card to upgrade my computer. I'm running a HP-pavilion model NP249AA-ABA p6127c with windows 7 installed.
I need the graphics card to successfully run programs like Maya, Mudbox, and unity. Especially Mudbox!

It would also be nice if it could run portal 2, half-life 2, the stanley parable, dead space, and octodad. I'm barely able to run minecraft on this thing. The current graphics card is Intel(R) 3100 (Intel(R) G33/G31 express Chipset Family) And its just terrible.

I'm looking for a Nvidia graphics card. Currently I'm looking at the Zotac Nvidia GeForce GT 640 2GB Graphics Card.
It needs to be affordable. Preferably under 100$.

Apple iMac is screwed. Maybe?

Our 3 year old Apple iMac is… Really really slow. The internet is my last resort (I'm asking this on my PHONE). It's a shared computer, with my four-person family. It's been giving us 'startup disk is almost full' messages for a month or so. So we bought an external hard drive (3 terabytes - plenty), and set it up… Sort of. Because of various reasons including my brother's obsession with minecraft, I never got the chance to clean up the 500GB startup disk, transfer files, etcetera. The disk is now completely full, so full that the computer is too slow to log on. There's a backup on the external hard drive, but now the computer is literally too full to clean up. Is there anything I could possibly do to clean it out or will we have to buy a new computer?

Minecraft tree house ideas?

I'm making a large tree house, multiple room and levels, just looking for some ideas to add to the house. I'm open to anything you guys got.

How to update my Minecraft?

When I log into my mine craft account, it says "ready to play version 1.7.10", but when I enter the game and go into creative mode to check if the new blocks are there, diorite and other blocks aren't there.