Software & Apps Windows How to Fix STOP 0x0000004F Errors A troubleshooting guide for the 0x4F Blue Screen of Death by Tim Fisher General Manager, VP, Lifewire.com Tim Fisher has 30+ years' professional technology support experience. He writes troubleshooting content and is the General Manager of Lifewire. our editorial process Facebook Twitter LinkedIn Tim Fisher Updated on May 20, 2020 Windows The Ultimate Laptop Buying Guide Tweet Share Email Most 0x0000004F BSOD errors are caused by software problems or viral infections, but hardware or device driver issues are other possible causes as well. The STOP 0x0000004F error will always appear on a STOP message, more commonly called a Blue Screen of Death (BSOD). Blue Screen of Death in Windows 10. Any of Microsoft's Windows NT based operating systems could experience the STOP 0x0000004F error. This includes Windows 10, Windows 8, Windows 7, Windows Vista, Windows XP, Windows 2000, and Windows NT. 0x0000004F Errors One of the errors below or a combination of both errors may display on the STOP message: STOP: 0x0000004FNDIS_INTERNAL_ERROR The STOP 0x0000004F error may also be abbreviated as STOP 0x4F but the full STOP code will always be what's displayed on the blue screen STOP message. If Windows is able to start after the STOP 0x4F error, you may be prompted with a Windows has recovered from an unexpected shutdown message that shows: Problem Event Name: BlueScreenBCCode: 4f If STOP 0x0000004F isn't the exact STOP code you're seeing or NDIS_INTERNAL_ERROR isn't the exact message, please check my Complete List of STOP Error Codes and reference the troubleshooting information for the STOP message that you are seeing. How to Fix STOP 0x0000004F Errors Restart your computer if you haven't already done so. The STOP 0x0000004F blue screen error may not occur again after rebooting. Use avastclear to uninstall Avast Antivirus, assuming you have it installed. Some versions of Avast can, in very specific situations, cause a 0x0000004F BSOD. If you can't get Windows to stay working long enough to get Avast uninstalled, try starting in Safe Mode instead and uninstall from there. You can also try using a program uninstaller. If uninstalling Avast fixes the problem, download the latest version from their website and reinstall. Running a clean install of the latest available version is unlikely to make the 0x0000004F BSOD reappear. Update the drivers for your network card if updated drivers are available from your computer or hardware maker. The 0x4F BSOD indicates some kind of issue related to the network drivers (NDIS is an acronym for Network Driver Interface Specification), and the quickest way to fix a possible issue with network drivers is to simply replace (update) them. Since you're probably not given any more specific information on the BSOD about which drivers need replaced, don't forget to check your wireless network card, Bluetooth, and wired network devices for updates. Test your computer's memory. Some 0x4F errors are due to bad or failing RAM. You'll need to replace RAM that has failed tests. There's nothing repairable about your system memory. Perform basic STOP error troubleshooting. These extensive troubleshooting steps aren't specific to the STOP 0x0000004F error but since most STOP errors are so similar, they should help resolve it. Need More Help? If you're not interested in fixing this problem yourself, see How Do I Get My Computer Fixed? for a full list of your support options, plus help with everything along the way like figuring out repair costs, getting your files off, choosing a repair service, and a whole lot more.