Error 502 Corrupted BIOS
This issue happened in my HP Laptop after I ignore the W indows 10 update and my laptop battery drained while it was closed folded, so I plugged in my laptop and open it but I got the error 502 corrupted bios . I've tried so many things to fix it until my laptop forced to open into recovery mode because the OS won't continue to desktop. All you have to do is to go to windows recovery settings > advanced > troubleshoot > reset your pc > choose the Keep my Files. All the installed program will be wiped but your saved files still remain and the issue on the error 502 corrupted bios will be gone. This will be a long process so make sure you plug in your laptop before doing this method.