I think there used to be a Windows explorer add in which added RAW image files to the Context menu. I used that in XP -- so I don't know if its still around - used to be called RAW viewer or something like that.
I now use Abobe Bridge / Photoshop so the EXIF is always presented .
I know the tooltip is probably what you are looking for but these days there are so many different Camera RAW formats it's probably not easy to extract the EXIF info in every case.
There is however a piece of freeware called irfanview --this might be suitable for what you want. Download IrfanView