My name is***** am sorry to hear that you have this issue, I look forward to assisting you today with your question and providing the best answer possible.
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Would you please do this activity and update status
1: Open Device Manager (Click Start > on Run window type devmgmt.msc press enter key)
This opens device manager window
2: Under Device Manager> Click Keyboards section > and remove all items that shows under it
You can remove by right click item > Click Uninstall
Note: Do for all keyboards items that shows under keyboard section
3: Now reboot machine and see if it makes a difference
If issue appear even after, please answer
1: Does issue appear in welcome screen where you enter password ***** login desktop?
2: Can you create a second user profile and see if keyboard works on that profile?
3: If you have a second USB keyboard, check if that works fine?
waiting for your reply
Thanks for update..
Would you please check whether filter key is enabled.. If so turn off.
1: Click Start > on search window type easy access
Click on easy access tab when find out
2: Check for option "Turn on Filter Keys" and uncheck if its enabled under "Make it easier to type" section
3: Click Apply button
If filter key is already off, you may disable all third part services and reboot computer
1: Click Start > on search window type msconfig press enter key
2: Click Services tab > check "Hide all Microsoft tab"
This hides all Microsoft services and display all third party services..
3: Now click Disable All button to disable all third party services
4: Click Apply and reboot computer
Check status and update
Would you please update for above post
Do you get my response?