Some basic questions

I did a quick format of a WD black drive in windows. I have since installed new things on that drive, but want to go back and look for files that got cleared in the format. Will Recova harm or interfer with current files/installations I have on the drive?

Sorry I could not find an answer in the FAQ.

No, but the current files/installations may make the files you want less likely to be recovered as part/all of a file may be over written