Aayush Bhaiya,
What is the current state. If it is asking for a BitLocker recovery key and you cannot access your account then no you cannot use the laptop.
If you can still access the laptop depending if it is Home or Pro edition. Go to Control Panel > Device encryption (for Home) or Control Panel > BitLocker (for Pro) and print off the recover key for safe keeping just in case there is a problem and the recovery key is requested.