Its really simple guys
you just have to follow some simple steps given below
Step 1:- Press Window key + R and open “RUN” then type “REGEDIT”
Step 2:- Navigate yourself to HKEY_LOCAL_MACHINE/HARDWAR as shown below image
Step 3:- Then from HARDWARE navigate yourself to DESCRIPTION/System/CentralProcessor.
Step 4:- Now at CentralProcessor, click on “0” as shown in picture. Then double click on “ProcessorName” . Now, here you can change the processor name.