c:\winmoff\folderforvirus32 => is correct path (on Win Sys, but not under Unixes)
c:\winmoff\\folderforvirus32 => is incorrect (everyware, I think)

$ mkdir /tmp/test
$ cd /tmp/test
$ mkdir 'c:\winmoff\folderforvirus32'
$ mkdir 'c:\winmoff\\folderforvirus32'
$ ls -1
c:\winmoff\\folderforvirus32
c:\winmoff\folderforvirus32
$ uname 
Linux
$
[download]

Testing whether a path is valid under Unix is easy: as long as it doesn't contain "\x00" (NUL character in C) it's a valid path. Any other character is valid, and only / is special: it separates the path components. Hence, in a component (file- or directoryname), all characters, except the NUL character and the slash are allowed.