Computer running wild, no reason!

Two mornings in a row I find my computer running resources so high I can't get any program to launch, and it won't turn off unless I force it with the CPU button. I had left the computer on over night.

It is a: HP Pavilion desktop, Win 7 64 bit, SP 1 all up to date.
I check Task Manager Processes and the top user is SVChost.exe System 177,672.

There are 4 more listings of SVChost.exe, 1 network, 3 Windows Services
All though the Resources graph shows CPU use all the way to the top, the hard drive light on the front of CPU is not on or blinking!
It is like some other thing has captured my computer and I'm helpless to stop it until the forced shut down.

I've run Malwarebytes, Norton Internet Security scans after restart and nothing. What the heck is causing this?

 

Well, "plodr", that doesn't help me. Anyone?? Do I need to move this out of Hardware?

 

The SVCHost.exe is part of windows and there can be many instances running.
http://windows.microsoft.com/en-us/windows/what-is-svchost-exe#1TC=windows-7

The hard drive light only blinks when there is hard drive activity (reading or writing). CPU activity does not mean there is hard drive activity.

Have you tried booting your system into safe mode (restart, hold F8 during bootup and select safe mode from the menu)? If there is a process that is using all your resources booting into safe mode will prevent it from running. If the system runs fine in safe mode it's probably a rogue process.

I would click start and enter 'msconfig.exe' (requires elevation) when the system configuration opens click on the startup tab and ensure nothing is running that doesn't need to be. A lot of programs like to add entries so they startup with Windows.

How much memory (RAM) is installed on your computer (Control Panel > System and Security > System)?

Does it behave this slowly after you restart your system? Does it take time to become unresponsive or is there any applications that you run where it stops or slows down after you run them?

You may want to run a chkdisk on your hard drive to make sure it's not having any issues (Start > Computer, select computer from list to the left, right-click C:\ drive and select properties from popup menu, click the tools tab, and click Check now under Error-checking section).

 

LordOLives: I have 6 GB RAM.
This doesn't happen when I'm using my computer. I find it that way fairly often when I get up in the AM, and I've left the system running over night.
Whatever is "running" disables the system. Will not launch a program, nothing I click on works. Will not shut down until I force it with the button on the CPU. When this happens and after I force a shut down I can restart with regular Win boot and everything works fine because whatever has captured it gets shut down.

You explained why the CPU light isn't blinking, but what is running? The HD or fan is running at high speed from the noise.

How do I stop this seemingly capture of my system? Leaving the computer off at night stops it of course, but I prefer to have it run maintenance at night.

I check the Start menu and lean it out regularly and also run Ckdisk. Utilities I use regularly are: CCleaner, Glary Utilities 5, IObit Toolbox, RegInOut, Revo Uninstall. I have up-to-date Norton Internet Security and Malwarebytes always going.

 

Have your maintenance tasks completed running when you try to use your computer in the AM? How are they setup to run?

Is your system configured to sleep or hibernate?

If you turn off all your maintenance tasks is your system still unresponsive the next morning?