Are you executing some wmic commands, most likely with a format command and getting the following error : Invalid XSL format (or) file name.
for example : wmic process list FULL /FORMAT:CSV
You running on Windows 7 (64-bit) or Windows 2008 R2 and have installed additional keyboards or language settings.
It seems that some wmic commands use files that are located in a localized folder:
on 32-bit : C:WindowsSystem32wbemen-US
on 64-bit : C:WindowsSysWOW64wbemen-US
If you have for example a UK keyboard layout installed, simply copy C:WindowsSysWOW64wbemen-US to C:WindowsSysWOW64wbemen-GB.
Your format command above should work fine now.