The program can’t start because libxml2.dll is missing from your computer. Try reinstalling the program to fix this problem
When you try to run the vSphere Command-Line Interface (CLI) such as vihostupdate.pl, it might not work and giving you the error message below:
It shown more errors in the command screen
The problem might simply cause by you are not using the command under administrator privilege in Windows 7 or Vista platform. Try to run the cmd as administrator: