Are you loosing time on the server? Why not set up your time service to get the time from one of the government's time servers on the internet? If its your clients, they are getting their time from the server. To see how well the motherboard is keeping time, shut down and reboot into the bios settup. Check the time from there. shut down again, unplug the computer for a few min, then plug and start. check the time in the bios again. If the bios complains about anything or has the wrong time, change the battery again.