Find folder contents difference on WIndows 7?

I have a larger folder containing all my SVN files. I got attacked my a virus destroying some files but also corrupting SVN config files, so now TortoiseSVN cannot recognize it as a SVN folder.

I can redownload the repository to other location but there are some files I didn't commit to it.

Is there some software that can tell me difference in contents between folders or should I write a batch script that can tell me which files were not commited?