Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Computer Keeps Randomly Lagging (NT Kernel & System)

04 Nov 2013   #1
Ford F350 Man

Windows 7 Professional X64
Computer Keeps Randomly Lagging (NT Kernel & System)

Alright, so for no reason a week or so ago my computer starts randomly lagging, most notably when playing GTA IV. At first I thought it was the game so I re-downloaded and installed it, (I had some errors anyway).

While I was downloading it from GameStop I would minimize the window and switch users, then log back in to check the status, I could never get the window to restore, so I had to force the process to end. Twice my computer blue screened on me, my computer has never done this before or since.

I haven't installed any new hardware, or updated any drivers (myself), I did a full system scan and Norton didn't find anything. I also did a full system scan with Microsoft's Malicious Software Removal Tool, it found 4 infected files and removed them.

The one thing I did do (I think before I noticed any lagging) was an optimization, cleaned and defragmented the registry, cleaned and defragmented the HDD among other things. My hard drive was heavily fragmented, I don't remember what percentage, but it was a lot.

Still the same problem, so I upgraded Win 7 to Win 7 to re-install the OS (without touching my files) to see if that would fix the problem, and it didn't either.

So I checked Task Manager and this shows up as being the culprit, "NT Kernel & System" can take up anywhere from 20-30 to 40-50% of my CPU. Sometimes it's where it's suppose to be, between 0-3%, I would use KrView but unfortunately it only works up to XP SP1.

I'm getting tired of this random lagging BS, I haven't found a tool other then KrView that will tell me what I want to know. I'm hoping that some of you guys will have some other ideas on how to pinpoint this problem and fix it.

My System SpecsSystem Spec
05 Nov 2013   #2
Ford F350 Man

Windows 7 Professional X64

Okay, well While I was playing GTA IV the lagging thing started again, I think I found the driver within the nt kernel and system process that's causing the lagging.

This is the driver: stdriverx64.sys+0x5160, I think it has something to do with the Realtek audio. So I'm going to update the driver to the latest version and see what happens.
My System SpecsSystem Spec

 Computer Keeps Randomly Lagging (NT Kernel & System)

Thread Tools

Similar help and support threads
Thread Forum
System Lagging
Hello room, I am having this annoying problem.... Iam typing 5 to 9 words at a time but they are taking 15 seconds to show up on the screen. I have reboot=ed several times to no avail. please help me. I can not even do facebook without this happening. Same problem when i am using my email, etc.
Performance & Maintenance
System Event: ID 41 (Computer crashes randomly then reboots)
Hi guys, I've been having this problem for a few months now since my RAM got errors and had to be replaced. Every few days my computer will randomly reboot. When it crashes, the screen goes black and the HDD light stays on solid for about a minute, before it reboots. Any help on this would be...
BSOD Help and Support
Win 7 randomly starts lagging
As the title describes, my Windows 7 starts lagging all of a sudden. The best way to detect lag is to view any animation and check if it runs smoothly. Following tend to be choppy: The equalizer in Winamp The progress bars in applications The tab animations in browsers (when opening /...
Performance & Maintenance
Computer randomly Restarts, BSODS Cache Manager, System Service Except
Been happening to me for awhile computer will either crash after running for awhile and sometimes the BSOD will state a reason of Cache Manage or System Service Exception, or no reason at all. Sometimes the computer just randomly restarts though. Any help would be appreciated -System Spec...
BSOD Help and Support
my computer is lagging bad and not sure why
I am having troubles with my computer suddenly getting super laggy. It seems to happen when I am transfering avi files from one drive to another (it seems to freeze in the middle of doing this and then after 5 or 10 minutes picks up where it left off) but not exclusively limited to this. It is...
Performance & Maintenance

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 00:58.
Twitter Facebook Google+