I am also a Sotec 820P owner who had the same problem. The source of the problem is the CMOS battery located on the motherboard. You need to buy a CR 1220 lithium battery (Radio Shack sells them for $3.59), open the CPU panel on the computer and replace the battery. It's a 2 minute operation, very simple.
I am working on a laptop for a friend and she is having problems with slow startup. The thing takes like 10 minutes before it does anything. You can press the power button and it appears that nothing is happening. Then about 10 minutes later the light comes on and it starts up fine. I don't know that much about laptops...mostly a desktop guy, but this doesn't seem right. It is a Sotec model 820P with a pentium 4 2.0A GHz and 256 DDR SDRAM running Windows XP. Oh, if you restart the computer it will restart normally, it is only if you completely shut it down that it takes so long to boot. This leads me to believe it is a hardware problem, but like I said I don't know about laptops.