Hi Orkun. I'm Greg, 10 years awarded Windows MVP, here to help you.
Try these fixes for no Windows Hello options available on log-in screen in Windows 11:
https://www.isumsoft.com/windows-10/sign-in-opt...
https://windowsreport.com/windows-hello-not-wor...
(Avoid ad links which intrude into editorial copy, especially DO NOT INSTALL Restoro, PC Repair Tool and Reimage ads)
https://appuals.com/windows-hello-stopped-worki...
(Avoid ad links which intrude into editorial copy, especially DO NOT INSTALL Restoro, PC Repair Tool and Reimage ads)
https://www.youtube.com/watch?v=tXeNWTGVADU
Go over WIndows 11 System with this checklist to find and fix problems:
1) See if you can System Restore to a point before the problem started:
https://itechhacks.com/system-restore-windows-11/
System Restore is your first line of defense and can take you back to a point before a problem began like a time machine. If it doesn't help then you can undo it. Read about it first in the tutorial above and then try restoring to just before this started. If System Restore is not enabled on C drive do that now so it's available in the future.
If the problem repeats or System Restore doesn't work then check which Windows Updates were installed at Settings > Update & Security > Windows Updates > Update History, uninstall them there or System Restore again, then immediately check for and block the Updates with the Hide Updates tool explained here:
https://www.droidwin.com/how-to-stop-only-a-spe...
2) Update your drivers from the PC maker's Support Downloads webpage for your exact model. While there check for the latest Chipset, BIOS, Sound, Network, USB3, Bluetooth and all other drivers to compare with the version/date installled for that device in Device Manager reached by right clicking the Start Menu.
3) Expedite install of all Windows Updates (including Optional) in Settings > Update & Security > Windows Update > Check for Updates, watching for needed restarts, then go back to check again until no more are offered.
Then go into Microsoft Store app > My Library > Get Updates and expedite all Store app Updates, too, until no more are offered.
4) Run a full Windows 11 Disk Check:
https://allthings.how/how-to-run-chkdsk-in-wind.... This is to check the disk and file system condition which can factor into any case, and sometimes later proves to be the cause if it's left out.
5) Establish a Clean Boot to turn off Startup Freeloaders that can conflict and cause issues:
https://www.makeuseof.com/clean-boot-windows-11/
6) Test for account corruption by creating a new Local Admin account to see if the problem goes away:
https://pureinfotech.com/create-local-administr...
Sign into the new account, test it works correctly, if so move files over, test all apps work or reinstall any that don't. Then when ready delete the old account in Settings > Accounts > Family & Other Users.
You can change it to your Microsoft account if desired in Settings > Accounts > Your Info > Sign in with a Microsoft Account Instead.
7) Download, install and run a full scan with free Malwarebyes from
https://www.malwarebytes.com/mwb-download/ after enabling Root Kit scan in Scan Settings. Clean Up anything it finds and then run again. Turn off Real Time trial in Control panel to keep as on-demand scanner.
8) Run System File Checker/DISM in WIndows 11 to find and fix any broken System files:
https://www.elevenforum.com/t/use-system-file-c...
9) If that doesn't fix it then you can do a Windows 11 Repair Upgrade which reinstalls Windows while saving your files and apps in place, brings it up to the latest version by the most stable method, takes about an hour and resolves most problems:
https://www.elevenforum.com/t/repair-install-wi...
10) To get the freshest start possible you can do the superior Clean Install:
https://www.windowscentral.com/how-do-clean-ins...
Create bootable WIndows 11 media by following the steps under Create Installation Media, clicking the link "Before you Start" at
https://www.microsoft.com/en-in/software-downlo....
Make sure during the booted install to unplug all other drives, boot the media as a UEFI Device, choose Custom Install, delete all partitions down to Unallocated Space to get it cleanest, choose the Unallocated Space, click Next to auto-create and -format the needed partitions and begin install - this makes it foolproof.
After install expedite all Windows Updates including Optional until no more are offered. Then import any drivers from the PC maker's Support Downloads web page for your model that are newer, or branded instead of generic. The most basic thing we need to learn to maintain a PC is how to keep the latest manufacturer's drivers current. Windows drivers are rarely enough.
Feel free to ask back any questions. Based on the results you post back I may have other suggestions if necessary.
______________________________________________
Standard Disclaimer: There are links to non-Microsoft websites. The pages appear to be providing accurate, safe information. Watch out for ads on the sites that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the sites before you decide to download and install it.
