I have plenty of services that startup with my computer - Antivirus (AVG), Ad-aware ad-watch, Microsoft Anti-Spyware (beta), Steam, volume control for my Creative sound card, AT&T DSL service icon... maybe a couple others.
My problem is that the icons associated with these programs sometimes display themeselves in the taskbar, and sometimes they don't. It's not a matter of the auto-hide feature, or a problem with the programs starting up altogether - the processes are running, but there is no icon in the taskbar. And I know that an icon is supposed to be there as they have appeared before. Whether or not they actaully appear seems to be random.
Another problem wich may or may not be related is that I found the clock on my computer was 20 minutes ahead... how does something like that happen?