SOVLED! PCI Express Root Port

Regarding malfunctions that involve PCI Express root port on Windows, the usual suspects include outdated display drivers, corrupted system files, updates, etc. To restore the performance of your Windows computer, you should update the display driver, run SFC and DISM scan, delete update files, … Read to the end to learn what must be done to get the most out of the device. 

Questions About PCI Express Root Port

What Exactly Is  PCI Express Root Port?

Generally speaking, PCI Express Root Port is a port on the root complex and it connects to the remainder of the computer via the host bridge. The port allows Windows users to plug a wide range of components into their computer.

Do I Need To Update PCI Express Root Complex?

Unless you know your way around Windows, it is best to leave PCI Express Root Complex alone. Also, if an update messes up your computer, use System Restore to revert your device to a point in the past.

PCI Express Root Port Acting Up: Reasons

In layman’s terms, display drivers play a key role in the communication between computers and graphics cards. If you neglect updates for the display driver, it’s only natural that problems will show up eventually. Besides that, since system files define the way computers work, corrupted system files usually lead to errors. Last but not least, while Windows updates mean well, they could cause trouble if their files run into issues.  

A Few Fixes

Update The Display Driver

  • Step 1: Go to Search bar, type devmgmt.msc then press Enter.
  • Step 2: In Device Manager, expand Display adapters, right-click your graphics card and pick Update driver. 
  • Step 3: Follow onscreen instructions to update the driver.
  • Step 4: Once the process completes, restart your computer.
  • Step 5: When the screen comes back on, determine whether the issue persists. 

Run SFC And DISM Scan

  • Step 1: Press Windows + X to open Quick Link Menu.
  • Step 2: Select Command Prompt (Admin) to run Command Prompt with administrator privileges.
  • Step 3: In Command Prompt (Admin), run the command sfc /scannow to perform SFC scan. 
  • Step 4: When the SFC scan completes, proceed to run each of the following commands to perform DISM scan.
    • DISM /Online /Cleanup-Image /ScanHealth
    • DISM /Online /Cleanup-Image /CheckHealth
    • DISM /Online /Cleanup-Image /RestoreHealth
  • Step 5: Close Command Prompt, restart your computer and see how things turn out. 

Delete Windows Update Files

None of the above works? Then files of Windows updates must be at fault and you have no choice but to delete them. To delete Windows update files, go through the following steps:

  • Step 1: Go to Search bar, type Services and press Enter.
  • Step 2: In Services, navigate to Windows Update, right-click it and pick Properties. Proceed to hit Stop if Service status says Running and change Startup type to Disabled as well. You then have to save the changes by selecting Apply and choosing OK.
  • Step 3: Return to Services, locate Background Intelligent Service and repeat the process.
  • Step 4: Go to C:\Windows\SoftwareDistribution, press Ctrl + A to select all the files and press Shift + delete keys to delete them.
  • Step 5: Enable Windows Update and Background Intelligent Service then restart your computer. 


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