If CHKDSK didn’t sort things, try delete file with
\\?\
(ie. C:\folder\SomeFile.txt
becomes \\?\C:\folder\SomeFile.txt)
Start CMD,
typedel "\\?\C:\folder\some file."
More about:
http://blogs.msdn.com/bclteam/archive/2008/06/10/long-paths-in-net-part-3-of-3-kim-hamilton.aspx
Good luck