How to extend window 7 trail from 30 days to 120 days

 run the command prompt as an administrator

trpe the commang slmgr -rearm and press enter

after few seconds u wil receive the dialog box to restart u r computer .. press ok and restart the computer

after reboot see that u r computer hav come back to 30 days trail again src: http://technohackersbhutan.blogspot.com