And without the make/model machine I can't tell you much more than I've cured it by setting the date in the BIOS and saving the settings in the BIOS screen.
Just asking. Is the Forum Tip not showing during your post? It reads:
"Tip: If you are asking for help to troubleshoot a computer-related problem, please be sure to include all the necessary information (ie: operating system, model number, hardware, software, etc) that will help others identify your problem for a speedy resolution."
I am running WinME, 128MB. This system works very well except for this little problem at start up. While booting up it usually stop at a particular stage and request that you "Press F1 to continue or F? to reset" Keep in mind that this only happen on initial startup, never on a restart.