Software & Apps Windows How to Fix STOP 0x00000003 Errors 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 July 28, 2019 Blue Screen of Death in Windows 10. Windows The Ultimate Laptop Buying Guide Tweet Share Email The STOP 0x00000003 error will always appear on a STOP message, more commonly called a Blue Screen of Death (BSOD). One of the errors below, or a combination of the numerical one and one of the other two errors, may display on the STOP message: STOP: 0x00000003INVALID_AFFINITY_SETUNSYNCHRONIZED_ACCESS The STOP 0x00000003 error may also be abbreviated as STOP 0x3 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 0x3 error, you may be prompted with a Windows has recovered from an unexpected shutdown message that shows: Problem Event Name: BlueScreenBCCode: 3 Cause of STOP 0x00000003 Errors Most STOP 0x00000003 errors are caused by an issue with some parts of Windows and how it works with certain types of hardware but a device driver issue could also be the culprit. If STOP 0x00000003 isn't the exact STOP code you're seeing or INVALID_AFFINITY_SET 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. Don't Want to Fix This Yourself? If you're interested in fixing this problem yourself, continue with the troubleshooting in the next section. Otherwise, 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. How To Fix STOP 0x00000003 Errors The STOP 0x00000003 STOP code is rare so there's little troubleshooting information available that's specific to the error. Be sure to try the few ideas below but don't miss #3 if the first two aren't helpful: Restart your computer if you haven't already done so. The STOP 0x00000003 blue screen error may not occur again after rebooting.Download Hotfix 841005 from Microsoft but only if you're using Windows XP. After installing this fix, the 0x3 BSOD should stop appearing. Perform basic STOP error troubleshooting in the event that restarting or the Windows XP based fix doesn't work or doesn't apply. As mentioned above, try this only if you're using Windows XP. This particular fix for 0x00000003 STOP errors usually only occurs when multiple TV tuners are installed (like in homemade media center PCs) and is usually accompanied by an UNSYNCHRONIZED_ACCESS message. What This Error Applies To Any of Microsoft's Windows NT based operating systems could experience the STOP 0x00000003 error. This includes Windows 10, Windows 8, Windows 7, Windows Vista, Windows XP, Windows 2000, and Windows NT.