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Windows 7: Another CPU Usage at 100% issue...

22 May 2009   #1

Another CPU Usage at 100% issue...

Hey guys.

Edit : Put my system specs at the bottom.

Downloaded the 64bit Windows 7 RC from Microsoft's website. Installed it (fresh install, no upgrades). Booted in first time, everything seemed okay, it picked up drivers for everything I had automatically. Went to, downloaded the latest nforce (motherboard chipset) and GeForce (Video card) drivers and installed them; drivers were for Windows 7 64bit fyi.

Hadn't really used the computer much longer that day, finished installing some of my apps like Office 2007 Enterprise Edition, Adobe CS4 Design Premium Suite, FireFox, PowerDVD 7, uTorrent, and some sidebar gadgets then started up a torrent and let it download for the night (it was downloading America's Army iso, so no viruses if your wondering that).

Restarted the computer in the morning after doing Windows Update, then noticed that after an 30minutes or so the computer became unresponsive. The wireless would cut out and the adapter would disconnect, then the mouse + entire system would begin to lag severely. Went to start-> shutdown, got to the screen where it says 'Shutting Down' but the circle just spinned for days. So I held the power button and just shutdown manually.

Now it keeps repeating the above, where its fine for like 30 minutes (sometimes less or more), and then when I like watch something on Hulu or install something, or just do something that puts a strain on the CPU, the CPU hits 100% and just sits there.

I checked Task Manager, nothing is using any CPU really, went to resource monitor and saw Hardware Interrupts were causing the 100% issue. So I'm not sure what the issue is here... I read some were saying it was like an HD Audio thing they disabled in Task Manger (tried that, didn't work), other's thought indexing (I'm sure it's not that), and then others thought that it maybe due to the SATA drives settings?? Something about it being in PIO mode and it needs to be in DMA (I read that in another thread).

Anywho, if anyone has any advice or suggestions would be much appreciated. I think I've given as much details as I can. If someone wants like a HiJack This log, I can get one tonight, but it won't show much, as nothing is running besides Firefox and some gadgets...

Thanks in advanced!

My System SpecsSystem Spec
22 May 2009   #2


Run MSCONFIG and see what is starting at boot time. Disable some stuff one at a time, to see whats doing it. Download Microsoft's Sysinternals Process Monitor. It will help you identify the hog. You can get it Process Monitor
My System SpecsSystem Spec
27 May 2009   #3


So I reformatted, and reinstalled.

Heres the thing I've noticed. I'm only having this problem when I'm connected to my TV via DVI->HDMI (I have a GeForce 9800GTX+).

When I'm connected to a regular LCD Monitor (DVI->DVI or DVI->VGA), the computer runs flawlessly. I was able to play Crysis with all settings on Ultra High and the CPU never hit 100%. But when connected to my TV via HDMI, the CPU would always hit 100% and crash the OS.

Anybody here have a similar issue?
I swapped the hard drive with another and put Vista with SP2. It works fine when connected to my TV via HDMI (same hardware setup), so I'm assuming its some bug with 7..

Let me know what you guys think.
My System SpecsSystem Spec

06 Jun 2009   #4

Windows 7

Same problem. System interrupt averages 90% cpu usage. I have a dual boot system with xp pro along with Win7. XP runs fine. Removed graphics card (MSI R4830) and Win7 ran fine as well. I don't know anything about system interrupt other than it helps control cpu usage (?) so I'm interested on any input as well.
Downloaded drivers for catalyst that were supposed to be for Win7 but it made no difference.
My System SpecsSystem Spec

 Another CPU Usage at 100% issue...

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