ADDITIONAL to stevie here ... is look out for a file called something
.rar you may not be able to see the extensions if your files are associated with winrar !? open winrar and then navigate to the folder full of rars then you will be able to spot the
.rar file double click this and this will begin the unpack process
your next task is to decide where to extract to
just click extract and choose a location
then go from there depending on whats extracted you can work the rest out