Hey guys microsoft introduces windows 10 free of cost for windows 7 , 8, 8.1 users by upgrading their existing windows.
Pros
Windows 10 have great features alongwith thousands of apps
Cortana is new personnel assistant
Notification panel new look
No need of microsoft account
You can use your google account or any other to sign in or sign up
Awesome inbuilt apps
No need to install extra software for general ise persons
Cons
Asked for frequent updations or bulk updates
Updates on lower storage devices consumes too much spaces
Requires at least 4gb of ram for personnel.computers or laptops
Totally its an amazing windows ever forever
Guys you can upgrade it from going to microsoft officil website