Windows updates always bring bug fixes and new improvements, enhancing your PCs security and performance.
This update fixes some known bugs and vulnerabilities and brings new improvements.
Listed below are some useful methods to help you deal with the issue or optimize computer performance.
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Fixes to Windows 11 Slow After KB5034123 Update
Fix 1.
Press theWindows + Rkey combination to bring up the run window.
Then typeservices.mscin the text box and pressEnter.

Find and double-click theWindows Updateservice.
In the new window, click theStopbutton.
After that, clickOK.

Press theWindows + Ekeyboard shortcut to open File Explorer, then navigate to this location:C:\Windows\SoftwareDistribution\Download.
Use theCtrl + Akey combination to select all files, then right-press them to hit theDeletebutton.
Go to the Services window and start theWindows Updateservice.

Fix 2.
To fix this issue, you’re able to fire off the SFC command line.
Step 1.Open an elevated Command Prompt.
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In the new window, typesfc /scannowand pressEnter.
Once the command line is executed, verify if your rig is in good condition.
Are you looking for a Windows PC repair software to diagnose and fix problems with your system?

This post introduces several tools.
Fix 3. you’re free to do it via the Control Panel.
Use the Windows search box to open theControl Panel.
ClickUninstall a programunder theProgramssection.
In the left panel, clickView installed updates.
In the pop-up window, click theUninstallbutton next to KB5034123.
Fix 4.
If you need help from the MiniTool support team, just contact[email protected].