The error usually occurs beforehand, you should always pack keygens with WinRar, while you burn them you should run all programs and not surf the Internet at the same time.

It is best to save your important files twice on BluRay and SSD and every 5 years you should also copy your BluRay to a new BluRay. You can also save your non-personal data such as sound libraries on external Internet storage such as the free Google Drive, Mega, MediaFire and many others.

Most executable programs and keygens are usually deleted or not accepted by external Internet services, you can also pack all keygens separately with WinRar and burn a DVD etc.!

@macaca, however, you can still get most of them on the Internet, so you have not suffered a total loss.