Same as in Windows 10, Windows 11 also features a lock screen. IN this lock screen by default, you will see a clock and date above the standard Windows 11 background. Not all users will be happy with this choice but do not worry, you can choose and customize your lock screen to better suit your idea of it.
To personalize the lock screen do:this option will let you set a custom image or slideshow for your lock screen. Choose either one that best suits you. Under selecting picture or pictures for the slide show you can uncheck the option to see tips, tricks, and facts on your lock screen.
when clicking on this option you can select the application widget that you wish to be shown on the lock screen like weather, mail, calendar, etc. Choose if you would like one by clicking on it.
as self-explanatory this switch will enable or disable chosen lock screen wallpaper on your login credentials screen.
All settings will be automatically saved and applied and when you wish to lock the screen easiest way is to press ⊞ WINDOWS + L shortcut on your keyboard.

takeown /f FileNameAndPathNote: In the given command, “FileNameAndPath” represents the name and the path of the corrupted file. For instance, the corrupted file is named “wuapi.dll”, then you need to type “takeown /f C:/Windows/System32/wuapi.dll” Step 5: Next, you need to grant administrators full access & control to the corrupted file and you can do that via Command Prompt again. Step 6: In the elevated Command Prompt, type and enter the following command to execute it:
icacls FileNameAndPath /GRANT ADMINISTRATORS:FNote: We’re going to use the wuapi.dll again as an example. So the command should be like this: icacls “C:/Windows/System32/wuapi.dll /grant administrators: F”. Step 7: Now all that’s left to do is replace the corrupted system file with a good copy from a trusted source. Once you have a copy, open an elevated Command Prompt again and execute the following command:
copy NewFileLocation FileNameAndPathNote: In the command given above, the “NewFileLocation” is the location where you have saved the copy of the file. For instance, if you’ve saved it on your desktop, this is how it should look: “copy C:/Users/<username>/Desktop/wuapi.dll C:/windows/system32/wuapi.dll”

Once you are in the control panel, switch your view to large icons and locate Indexing options.
Inside indexing options, click on advanced.
In advanced options click on the rebuild and confirm.
Leave your computer to finish and your searches should be working fine now.