Sir, recently I noticed that in my windows 7 task manager there were only 3 cores in the performance bar (it used to be 4 before), while I have a core 2 quad processor . So I checked in the device manager but there also I saw only three processors , I have attached some photos of the task manager and device manager. So I used a well known tool called CPU-Z , even that shows that i have three processors !. I am quite worried about it . So please give me some help to recover my one processor .
Don't cores get shut off, if they're not being used, to save power?
You can also ask questions over in the processor community at http://communities.intel.com/community/tech/processors - they may have more insight than the server community.