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Windows 7: Win7 Svchost murdering CPU on boot for hours

23 Oct 2014   #1

Windows 7 Ultimate x64
Win7 Svchost murdering CPU on boot for hours

Hey there,

BRAND new to this forum but I've been a lurker for quite a while. I've got a custom build Win 7 Ultimate x64 box that, every time I boot the computer, the CPU is hammered by a Svchost (Power, PlugNPlay, DComLaunch). I cannot for the life of me figure out what's going on so I'm asking for help. Here are a few environmentals:

Win 7 Ultimate 64-bit
Asus P6T mobo with latest BIOS
18 GB mixed-brand RAM (2 matching sets)
Tons of storage over several drives (some SATA, 3 USB) (OS lives on SSD)
Nvidia GTX 460 with the latest drivers

It takes the computer several hours before the CPU stops doing what it's doing. I usually reboot at night to use the computer the following day.

I had followed this thread down until they got to the sound issues, which turned out to not be my issue (in case anyone was going to point that thread out to me).

I had hoped to install Windows 8.1 (for the speed) but had a similar issue. I loaded Windows 7 (old reliable, right?) and ran into the same issue so I decided I needed to face it head-on rather than trying to dodge it, which is why I'm here.

Thanks in advance!

My System SpecsSystem Spec
23 Oct 2014   #2

Windows 10 Pro (x64)

Get process Explorer and use that to pin point which service is the cause. Then we might get closer to figuring out the issue.

I'm thinking it is Plug and Play trying to work with a defective device. But with actually having data I'm just guessing, based on how it did that with Windows 8 as well.

To further test, disconnect all USB devices, other than keyboard and mouse. And see if the problem still persist.
My System SpecsSystem Spec
23 Oct 2014   #3

Windows 7 Ultimate x64

OK, I'll unplug everything and boot naked (essentially, right?) and then maybe add one at a time and see where it chokes on itself.

I've got process explorer running but will have it log once I reboot the box again (probably with all of the drives attached to see if something obvious and less time consuming comes up).

Thanks for the idea! I'll post back this evening after some testing.
My System SpecsSystem Spec

23 Oct 2014   #4

Windows 7 Ultimate x64


Attached Files
File Type: txt svchost.exe.txt (10.6 KB, 7 views)
My System SpecsSystem Spec
23 Oct 2014   #5

Windows 7 Ultimate x64

This is what I'm seeing in process explorer (for those who like pretty pictures).

Attached Thumbnails
Win7 Svchost murdering CPU on boot for hours-screenshot_000004.png  
My System SpecsSystem Spec
25 Oct 2014   #6

Windows 7 Ultimate x64

Bumping this thread. The issue still is far from solved.
My System SpecsSystem Spec
26 Oct 2014   #7

Windows 7 Ultimate x64

OK, stripped it down to just the OS drive and removed the floppy disk (doesn't exist) from the BIOS. CPU still getting hammered. Any suggestions?
My System SpecsSystem Spec

 Win7 Svchost murdering CPU on boot for hours

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