I've been told that if I delete a file from the disk or if I save a
newer version of a file eg Word Document, there are of getting both,
ie, recover the deleted file and also recover previous version of the
files I've saved (this example, the Word Document). Is it true?
Because I have sensible information that I had to remove from my
computer how can I prevent that without having to format and reinstall
Windows again?

TIA