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Access your Bitdefender Central account.
Click on My Devices.
In the My Devices window, click the INSTALL PROTECTION button.
Choose one of the two available options.
NOTE: Install Bitdefender on the computer you're using by clicking on Protect this device, or you can install it On another device.

Forgot Your Passphrase?

If you have forgotten your passphrase, there is no way to recover it as the passphrase is not stored anywhere. The only option is to erase your current passphrase and start all over again. You will lose all your existing data stored in Zoho Vault. The process to erase the passphrase differs based on your role in Zoho Vault.

How To Fix System ntoskrnl.exe Process High CPU/RAM uses in Windows 10?
Clean your PC using a trusted antivirus.
Update the faulty and outdated drivers.
Disable Runtime Broker to fix high CPU and memory usage. Go to Start menu > Settings app and then open System > Notifications & Actions.