It definitely works here.
Does the search actually complete, or does it get stuck forever?
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If it gets stuck, something has installed an IFilter on your system which is crashing or getting into an endless loop.
You can use this tool to see which IFilters are installed on your system and try disabling them to work out which one is causing the problem (needs a reboot after making changes, according to the page): http://www.nirsoft.net/utils/search_filter_view.html
Alternatively, if you generate a Task Manager dump we may be able to use that to tell you which component is causing the problem.
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If it doesn't get stuck forever, please send us the file you think should match but isn't matching so we can have a look at it.