XPS 8500 shutdown/restart problem

Last week, I received my first Dell PC, an XPS 8500 and a Dell UltraSharp U2412M 24" monitor (love the monitor; not sure about the PC). After I shutdown the PC in Windows, pressing the power button does not restart the PC. I have to turn off the power at my surge protector, thereby turning off every other device connected to it, then turn the power back on at the surge protector ... this causes the XPS 8500 to start up. I would appreciate any assistance to resolve this problem.

Also, I understand that when I first activated this PC, a Dell Welcome screen was supposed to appear displaying setup procedures, how to create Recovery Discs, etc. There was nothing like that on my XPS 8500, just a message asking me to accept the McAfee Security Center (which I uninstalled since I want nothing to do with McAfee). I created a pair of Recovery discs (which I've already had to use twice), but I'm curious why this Dell Welcome screen never appeared on my PC. On all my previous PCs (mostly from HP), there was always some sort of "getting started" guide that appeared, numerous Desktop icons, etc. The sole icon which appeared on the Desktop of my new Dell was for the Recycle Bin. I'm glad to avoid most of the "bloatware" which came with my HP computers, but I'm wondering why there was virtually no setup guide (other than for McAfee) on this PC.