I'm looking for an alternative version control software to TortoiseSVN/ Subversion. Only interested in those with a GUI and an easy installation process, though if multiple installations are needed (Such as vault, which needs both a client, server, and lots of other stuff), please give some installation instructions with your answer.
I'm a one man shop as of right now.
I'd be interested in why you don't like SVN, but some alternatives that I have some experienve with and are free (atleast for one man shops):
I like Perforce when in an environment with a lot of users (but then it starts costing serious money), but for my personal (one man) stuff, I use SVN - it's much easier to administer.
Just as matter of interest why is it that you dont want to use subversion? If you dont want to look after the subversion server and repos, you can always put them in places like assembla, or similar(i only used them and pretty happy wit the service and the value) , that for a small fee will look after all that and the integration with trac, etc. And the integration tools with most IDEs are pretty good.
Other option is git, tho integration with windows is not great and this is something that you seem to be very interested in.
(I m not afiliated with assembla, just a happy customer so far)
I second Bazaar -- I've recently been part of converting two teams to using it and it's been quite easy. (Think of it being like git, but able to work in the same way you're used to doing with svn, plus able to work on Windows.) Two people in my office are using TortiseBZR on Windows with good success. It's easy to set up a server too -- I had it done in less than 30 minutes and able to work with others. (The easiest/quickest way to do a server is over SFTP, but you can do it all on your machine too, if you'd like.)
Git Extenions looks like a better way of using Git in Windows than the alternatives. It even comes with a Visual Studio plugin.