If you accidentally delete a file, it goes to your Recycle bin. You open
your Recycle bin and you select the deleted files and you just click restore
and they are back. So this is not a big worry.
What you should be concerned about is file corruption from virus or just a
plain crash of your hard drive or anything else like this. Also you may
edit an original file and by mistake you save it with the original file name
and now you can't get back the original file.
The only protection for this is to copy your photo files to a CD-R. The cost
of CD-R is so low, this is the best protection. Also, you don't need any
software to copy your photos to a CD-R. You just use XP to copy to CD-R.
