How often would you hit a block with CPU mining now, mining with a good i7 processor? I mean, is it a matter of hours, days or weeks or... years?
I have 1 4core/8thread and 1 8core/16 cpu mining and I get between 2-4 blocks a day between both of these CPUs. With a single quad core, I would expect 0-1 blocks a day, certainly 3-4 a week.
In order to mine is there anything special you's have to do or is it just sufficient to leave the wallet open? How many of the CPU's resources would the wallet use?