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I see from the post that you are having issues with the computer not booting after removing the BitLocker on your HP PC. Don't worry I'll try my best to help you with this,
Let's start off by performing a Hard Reset on the Notebook:
Next thing, I would suggest here is to order a set of recovery media from HP and perform a system recovery which will format the hard drive and set the computer back to the original factory shipped conditions. You can check if the recovery media is available online on www.hp.com/drivers by entering the exact model no. of your laptop. To find the exact model no. click here: http://hp.care/2bygf7l
Otherwise, you could also reach HP phone support to order the recovery media. If your product is out of warranty, please choose paid options to get the tech support number.
Please use the following link to create yourself a case number, then call and it may help speed up the call process: