I incorrectly changed the number of processors in msconfig to 4.... my system has an i5 dual core processor. The original number was 1. My computer will not boot to safe mode. It will run a startup repair utility, but will not fix my problem. I can then view advanced options and get to a command prompt. When checking "set" from this prompt (X:\sources\recovery\tools>set) it has a line that states the number of processors=4. Is there a way to change this number back to 1?