Hi,
I'm not 100% sure if you want just teh contents of teh windows directory or everything on the disk but this is much easier in PowerShell
(This will change into the root of your C Drive)
PS>cd c:\
(This will change into the windows directory)
PS>cd c:\windows
This will return all files beginning with wi
PS>Get-ChildItem wi* -recurse
if you really want to do it in batch file/cmd then
cd c:\
dir wi* /s