I have a problem as follows: When I power on my PC after an extended period (several hours) it takes anything up to 20 mins before it completes the POST and boots up. Actual bootup time, after the beep, is about 45 seconds. Re-starts seem to work normally. I have run BOOTVIS, disabled non-essential startup items, cleaned and defraged the drives. I suspected a power supply problem, however I have checked the voltages using Everest and they all appear to be okay. Obviously this is is done after the O/s is loaded, could the power unit be causing the delay to the POST but running fine once the system is up. Can anyone suggest another cause to investigate?