#1 like a noob
win + r ; "REGEDIT"
#2 like a pro
REG ADD HKCU\psw\pp /v DeviceState /t REG_DWORD /d 1000001
/v : name of value  |  'deviceState'
/t : type             |  'REG_DWORD', 'REG_BINARY', 'REG_LINK' ...
/d : data            |  1 , 1000001 ...
HKCU : Current User 

#BTW 'reg add' do modify too