Hi Simran,
I'm Dyari. Thanks for reaching out. I will be happy to assist you in this regard.
Have you installed any suspicious software so far? Have you installed any updates?
If no, press ALT + F4 to turn off your computer (not restart) or try to turn off your computer with your keyboard. Then, turn it on. Does it work for you?
Please let me know if you need further assistance and keep me updated.