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MARK HUBER asked on March 21, 2013. Status: Answered & Closed.


» After a fresh build of a new system, I've been having temporary situations where the CPU usage jumps to 100% as well as Network usage and memory. I've tried using Windows 7 Home Premium, Professional, and Ultimate (all 64-bit editions) with the problem occurring on each one.

Best Answer

» The file ataport.sys is a Windows device driver file located in%SYSTEMROOT%:\WINDOWS\System32\DriverStore\FileRepository\mshdc.inf_amd64_neutral_a69a58a4286f0b22\. Its file size is 155728 bytes, the version is 6.1.7600.16385 and the last update is on 7/13/2009 4:19:53 PM.

The ataport.sys is used to support your Windows hardware device driver ATAPI Driver Extension. If the driver ATAPI Driver Extension becomes corrupted or outdated due to viruses/Trojan(Exploit:JS/Blacole.GB), you would receive ataport.sys blue screen of death (BSOD), sometimes along with error code 0x16B4(The dynamic deregistration of the DNS record ') and stop error messages 0X9120840M. Even you start your computer in Safe Mode, you would get system restart loop problems.

The easiest way to resolve ataport.sys BSOD issue is to download and update your device driverATAPI Driver Extension and keep it the latest. To download and update ataport.sys driver, you can use ataport.sys file repair tool DLL SUITE.

DLL Suite has a built-in feature of fixing BSOD, and helps download and update your ataport.sys driver to repair ataport.sys problems. It also enables to streamline your pc by repairing the associated dll file errors and restoring the performance of your system.

LISA PHILLIPS replied on March 27, 2013

All Answers:

  1. J THOMPSON replied on March 21, 2013: » You may try to runSystem File Checker (SFC scan). The System File Checker tool to determine whether the issue that you are experiencing is caused by one or more system files that are used by Windows, The System File Checker tool scans system files and replaces incorrect versions of the system files by using the correct versions.

    To run the System File Checker tool, follow these steps:

    a. Click Start, and then type cmd in the Start Search box.
    b. Right-click cmd in the Programs list, and then click Run as administrator.

    If you are prompted for an administrator password or confirmation, type your password or click Continue.
    c. At the command prompt, the following line, and then press ENTER: sfc /scannow

  2. MARK HUBER replied on March 21, 2013: » So far no luck. The SFC scan came up clean. I ran the Windows Live scan with clear results as well. I've also checked all the files with Tuneup Utilities 2011 and it said my registry was good too. I'll run the system idle scan later on tonight.

  3. DELIA TRUETT replied on March 23, 2013: » As for the problem, it seems to be ACPI.sys that's causing all the issues. Yet I have no idea what ACPI.sys actually does so I have no idea where to start. I do know however that after a clean boot the problem does seem to go away. Also, the CPU usage symptoms arise only when I launch a game and play it. Afterwards, when the game is closed, the CPU usage still remains very high, I've observed for a while to see if the problem might calm down, but it still persists way after the game's process has ended.

  4. MARK HUBER replied on March 24, 2013: » Well, I've discovered what "general" thing was causing the problem. It was my seperate graphics card (nvidia 9800gtx+). I called Asus tech support and the guy suggested I try using the onboard graphics to see if that helps... and it did. I haven't gotten the high cpu usage or driver interrupts at all! Only problem is, on board graphics suck and I want to use my own card!! Now that we're one step closer, any idea what could cause a graphics card to cause the high usage or what would it even have to do with the drivers it was causing to have issues with )like ndis.sys, ataport.sys?)

  5. ADAM GAWRYLUK replied on March 25, 2013: » We are glad to know that you were able identify the cause of the issue.

    I would also suggest you to download the latest display drivers from the Nvidia website and install it and check if it helps you fix the issue.

    You may access the link below and follow the steps to update display drivers on your computer and check if it helps.