These are known bugs that occur on Windows platforms. There are instructions for fixing them somewhere on the forum, but I can't find them. It has something to do with using forward slashes in path names instead of back slashes. So if you see something like this anywhere in the Arc source code:
(= some-var "arc/logs/srv")
change it to
(= some-var "arc\\logs\\srv")
Alternatively, switch to Anarki as jmatt suggested. That seems to be what most people use.
I got arc2 to work on linux and windows initially through searching the forums and finding bugs. It was an interesting exercise but overall I'd recommend arkani. arkani has more bug fixes and all sorts of interesting code to look at and/or use.
