A 94 year old neighbour of mine has been spending the last 12 months beavering away with his family tree and more importantly labeling his photos for future generations. He's got quite a collection and has asked me to help him move to a new computer as his old pentium running Vista just isn't cutting it.

I only met him a few months ago and have up until now just helped him out with his email because he tends to sign up to anything and everything and he's been scammed by several people into giving out his credit card details. He's a typically lovely bloke with many stories to tell who sadly can't understand why someone would want to trick him. He has all his faculties, he still drives even, but his kids (in their late 60's !!) know nothing about computers !

Now, the photos. He has used Picasa to label them all but I've never used it, in fact I've never used any photo software. He has more empty 'New Folder' folders than I've ever created and several directories are duplicated. I'm worried there are duplicate photos all over the place.

Is there any software I can use to check for duplicates and help with a general clean up ? Or does anyone have any tips on how best to tackle this ?

I've backed up pretty much his whole hard drive, just in case, but want to know more about Picasa before I try anything.