I recently upgraded the Project Management Software, which happened to be Redmine, for a company and after the upgrade I received some complaints regarding SVN not functioning properly. I initially thought there is no way that the upgrade caused an issue with SVN since SVN and Redmine are completely separate however you can browse the SVN repositories from within Redmine. Below I describe the error in more detail including an image of the error from TortoiseSVN, what I did to resolve the issue, and another possible resolution if your issue is different than the one mentioned in this article.
There are quite a few articles on how to do this around the internet but I noticed the other day that we did not have one so I decided to make a quick post on how to do this. In previous versions of Windows such as XP all you had to do was press F8 at boot time and the administrator account icon would appear on the log on screen so that administrative tasks could be preformed. This is not the case in Windows Vista or Windows 7. Below I will show how to enable the Administrator account using a elevated command prompt.