|Install teracopy, so nothing goes wrong here.|
Open a search window, and select where every your user folder is, or if you save to the C: drive, then select that, search for *.jpg
now you can click file select all, then copy, then paste where every you want. Teracopy will take over from there.
You can do this for any extension. *.doc *.xls or string them together *.jpg, *.bmp, *.xls
Forgot to mention that Teracopy will rename your duplicate files file(1) file(2) and so on