Search for files modifed on certain Date and Time range
Solution 1:
Should be possible with the Advanced Query Syntax that comes with Windows Search 4.0:
To specify a date range, type the property followed by two dates.
So, for example:
modified:11/05/06..11/05/07
There are videos from Microsoft that have a few tips on using the search tools too.
Actually, you might want to take a look at our recent blog post from Tom Wijsman on Windows Search: Digging Deeper: Searching in Windows.