This is probably it => http://support.microsoft.com/kb/909095

Had the same issue.

Tom

"Jonathan Sachs" <js070717@sbcglobal.net> wrote in message
news:l2q8h4pek9qulkgoaueq9552tr3hnh2jtm@4ax.com...
>I have a Toshiba Portege M200, and a few weeks ago I began getting the
> message "Insufficient system resources to complete the API" when I try
> to make the system hibernate. It doesn't happen all the time; the
> first attempt after a reboot is rarely fails, the second usually
> fails, and the third almost always fails.
>
> When I try to suspend, the results are even worse. The system APPEARS
> to suspend, but I get the error when I try to wake it up again. Then
> there appears to be no way to make the error box close, to unlock the
> computer, or to restart in an orderly way. The only way out is to do
> a hard power-off and restart.
>
> I have run a full scan of the disk with AVG free edition. It assures
> me that the system is clean.
>
> Any ideas what is wrong, and how to fix it?