The startup prompt "Your device is missing important security and quality fixes" means that the latest update patch is not installed on the Windows system, which may cause security risks or known problems. 1. Check whether the network connection is normal, try changing Wi-Fi or using mobile phone hotspots, and set up public DNS; 2. Run Windows Update troubleshooting tools to automatically fix common problems; 3. Run commands to reset and update components and clean caches through the administrator command prompt; 4. Manually go to Microsoft's official website to download and install the corresponding patches. Following the steps can usually solve this prompt problem, but it needs to be handled in time to ensure system safety.

When you boot up, you see the prompt "Your device is missing important security and quality fixes", which means that your Windows system does not have the latest update patch installed. This may put your computer at security risks or some known problems. The solution is actually not difficult, but many people don’t know where to start, or the update always fails.

Below are some practical operation suggestions to help you solve this problem.

Check if the network connection is normal

Windows updates require network downloading of patch packages. If the network is unstable or restricted to access Microsoft servers, the update will naturally become stuck.

• Make sure your network is available
• If you are using a company or school network, there may be firewall or proxy settings that restrict updates
• You can try changing Wi-Fi or using your phone hot spot

Sometimes you may not realize that there is a problem with the network, such as an abnormal DNS setting may also cause the Microsoft server to be unable to connect to. At this time you can try using public DNS, such as 8.8.8.8 of Google or 1.1.1.1 of Cloudflare.

Run Windows Update troubleshooter manually

The system's own troubleshooting function can automatically detect and fix some common update problems.

The operation path is as follows:

• Open Settings
• Enter "System" → "Troubleshooting"
• Find "Other Troubleshooting" or search directly for "Windows Update"
• Run the troubleshooting tool and follow the prompts

This tool will check whether the update service is disabled, whether there is file corruption, etc., and try to repair it automatically.

Reset update component using command prompt

If the regular update keeps failing, there may be something wrong with the Windows Update related service or cache. You can reset these components via the command prompt.

The steps are as follows:

• Open Command Prompt as administrator
• Enter the following commands in turn (the next one will be entered after each execution):
  • net stop wuauserv
  • net stop cryptSvc
  • net stop bits
  • net stop msiserver
  • ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
  • ren C:\Windows\System32\catroot2 catroot2.old
  • net start wuauserv
  • net start cryptSvc
  • net start bits
  • net start msiserver

Doing this is equivalent to cleaning up the old update cache and database, allowing the system to restart downloading and installing patches.

Finally, you can try manually downloading and installing the patch

If you know which update is missing, you can directly download the corresponding patch to install it on Microsoft's official website.

• Access Microsoft Update Catalog
• Enter the update number you need to install (usually found in the error message)
• Download and double-click to install

This method is suitable for people who have a certain understanding of system updates. It may not be easy for ordinary users to determine which patch to install.

Basically these are the methods. Although the problem seems scary, it is not a big problem most of the time. It can be solved by just step by step. The key is not to ignore it, because security updates are really important.

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