remove items from index manually

Is it plausible to delete files from the index manually? this is because I
reguarly find files (when I use the search-function) that I deleted more than
a month ago. then I see this screen:
http://upl.vs-hs.com/d/51c2250b244a6e25b6d3161bc528bf69

if the answer is yes: how can I do this?
if the answer is no: suggestion for the next Vista-update?

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Hi Sanderl,

Since the Index runs slowly in the background during low or no usage times updating itself, it may not always be updated and have accurate search results for recent items that were deleted or added. You can manually Rebuild the index to force it to update quicker if you do not want to wait on the Index to do it on it's on.

Indexing Options

Hope this helps,
Shawn