Bit Defender installation process error
There are certain files that it is looking inside the system32 folder.
Repair the operating system, of your computer and then try reinstalling the program after the repair process is finished.
Download a Microsoft Security Essential program because if you know the Windows Defender, It does what the Windows Defender do and the same goes for Bit Defender.
You have to have genuine licensed operating system to do install this or your installation might lead to saying that your operating system is a counterfeit software. It is a free download program so you won't do any additional payments to Microsoft.
Quarantine files are mostly stored in your computer.
They where just in an encrypted files and named in other format so that your operating system could not recognized them.
Only your antivirus can recognized them as quarantine files.
These files are just stored in a temporary and hidden folder.
You will see this in your explorer if you set the option of your explorer to show hidden and system files and folders.
Possible reason why the system reported, that the file or folder is missing because you have deleted the folder or files manually.
You might think that those file are Viruses since the file or folder looks like a binary file that was used by a virus.
Try to find a undelete tools to restore the file.
That’s the only solution for this.