I don't think that this folder is fully "self-repairing".
I've never heard of anyone deleting it, and am sorry but have no idea how to put
that right now that you've done it - other than maybe a repair/install ?
You could try this, but I cannot confirm from first-hand experience that it works:
http://www.myitforum.com/articles/1/view.asp?id=11203
And there are some useful links at the end of that article.
Some more background:
"These are the files used for Windows Management Instrumentation, or WMI,
which is Microsoft's implementation of Web-based Enterprise Management
(WBEM). Those files are part of Windows and are used to query the state of
the machine and other information. You should leave them where they are so
that any program you have that uses WMI to query for information will
continue to work properly."
