You should have a recovery key that was made when you enabled bitlocker. It can be stored in the following locations: - USB device. If you saved the key to USB, try to locate that device. - Microsoft account. Log into your Microsoft account and search for "bitlocker key". It will show your key in the search results. - Printed out. Check your "important papers" and see if you printed out the key.   If you cannot find it you will have no other option that to reinstall the OS, but before you resort to that I would click the "get help now" icon on the right bottom of this page to chat with a Dell agent.
Never had bitlocker set up but my computer is asking for a key, what do I do?
"DS:Never had bitlocker set up but my computer is asking for a key, what do I 
do?"