These are some of the most annoying problems I've ever run into in MSVC++ (and it started back in 4.0). It's trying to create the browe information files and that's failing. I think I just do a clean and rebuild, but you can also try going into the settings and turning off the browse information (both in the "C/C++" and "Browse Information" sections). I'm not on a windows machine to try it out right now, but I'm sorry you are having that problem and I feel for you. I cussed a lot figuring that platform out.
But browse information files are only useful when doing development because it lets you easily browse through the classes, namepsace and do quick searches for functions, variables, call graphs, type hierarchies, etc.
Edit: OOPS!! I just re-looked at your error message. It can't find your source files. Sorry, I didn't get much sleep last night. I don't know what you did for sure, but if you try to move your project files around, you're going to have problems like that. You can also try shutting down MSVC++ and renaming your .ncb file (the binary index file), but I'm not sure what else to say without telling you that you have to know compilers pretty well to do this.