@DeathReborn you should be able to re-install Win 10 while keeping all your programs & user data (make a Win 10 flash drive and run the setup after booting from your installed OS, not booting from the flash). You would essentially "refresh" your OS only. There's also a command that you can use to have the OS refresh corrupted system files. For more details read
here and
here.
If your OS is broken and you can't even migrate your bookmarks, then you're essentially sitting on a time bomb that will eventually have you lose some browser data anyway. Making a backup of your current browser's app/user data and attempting an OS fix seems like a sensible choice to me.
I recently had to wipe a friend's Win 10 installation because the system was no longer able to boot (corrupted OS files) and the options MS offers after you no longer have access to the local account with admin rights are very very limited. Without a recovery drive things become complicated fast. I would not let it come to that on a system where I still have options.
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