Can anyone recommend a source control solution for Visual Studio? I am going to be the only person using it, I just need something to back up my data every so often or before I undertake a big change in the software. I tried AnkhSVN, but this requires an SVN server. Is there anything that can be used locally that takes the pain out of copying solution folders manually?
With Subversion you can create local, file-system-based repositories for single-user access.
Probably the easiest way to use subversion (on windows) is to install TortoiseSVN. To create a repository, you simply create an empty folder in the location where you want the repository to be, right click that folder and select "TortoiseSVN -> Create repository here".
It is even possible (but not recommended) to create such a repository on a network share.
You can then access local repositories using a file-URL e.g: file:///D:/Projects/MyRepository
If you later find out that you need a server (e.g. to give other users access to the repository), you can easily install svnserve on a server and move the local repository to that server.
Just for completeness: as others have noted, there are several good clients for subversion (personally I'm using mainly TortoiseSVN and AnkhSVN):
SVN is the way to go. I would look at using the VisualSVN plugin rather than anksvn as it is much more modern and worth every penny.