Will this help? http://bloggingabout.net/blogs/erwyn/archive/2006/12/11/Windows-Vista-Sleep-Problems.aspx

>Brand name. When I created this thread I was hoping someone would say that there's a place in Vista to specify that it takes more than wind to put out a computer of its sleeping mode :-)
>
>One thing I noticed though is that it seems to me that I put the computer into sleeping mode but the hard disk doesn't really stop so the computer comes back on a couple of seconds later.