Windows operating system access iCloud My data was deleted and it was locked by mistake. When I restarted my macbook it was locked. Kindly request that it be restored for reuse

The first window tells all. You some how initiated an anti-theft feature which not only locks the Mac from use but erases all data and content from it so a thief cannot get it.

From this article:

If your Mac is lost or stolen - Apple Support

If you can't unlock your Mac

After you locate your Mac, you can unlock it by entering the passcode that you created when you locked it with Find My.

If you can't remember that passcode, you have three options:

• Sign in to iCloud.com/find, then select your Mac from the Devices menu. Select Unlock and follow the steps to verify your identity.
• Unlock your Mac from your iPhone, iPad, iPod touch, or Apple Watch using your device passcode.
• Take your Mac to an Apple Authorized Service Provider along with your proof of purchase.

Even if these steps work to get you back into your Mac, the data will likely be totally lost.