value, such as 0xF or 0×11110000.
Soft processor affinity determines automatically which processor should run a particular program, based usually on the processor that ran the program the last time. Hard processor affinity allows you to specify which processor you want a program to run on specifically. Windows Vista runs on soft affinity.
Do not mess around with your processor affinity unless you are well versed in computers and know what you are doing. Otherwise you could change some of your settings drastically and not be able to put them back. If you would like to change your processor affinity but are confused about how to do it, ask a professional to help you.