Hello Ganesh Bodake, Thanks for posting this in our community. Sorry to hear you're having trouble accessing your device due to a forgotten PIN. I understand how frustrating that can be, especially when you're trying to get things done quickly.
You can reset your PIN directly from the sign-in screen by selecting "I forgot my PIN" below the PIN entry box. This will prompt you to verify your identity using your Microsoft account password or another method like email or phone verification. Once verified, you'll be guided through setting a new PIN.
If you're already logged in, you can go to Settings, then Accounts, and choose Sign-in options. Under PIN (Windows Hello), select "I forgot my PIN" and follow the prompts to verify your identity and create a new one.
Hope this helps.
Kind regards,
John Oli