going to reopen this thread because...
I just purchased a new Dell from the local walmart. I finally see what the others were talking about with the power switch not turning on. as I said in my previous post, I have three computers where I could power on/off with the wemo switch. However, in this new Dell, the wemo switch will not turn it on - just off. So I guess I was wrong in my assumption about the power switch being on was the secret. so one Dell, one emachine, one acer will work and new Dell will not...I had another emachine that worked but no longer have it. dont really matter anyway, never turned the computers off anyway.
oh well, I was wrong and learned something new...