Windows had Officially Announced the new Operating System 10 which was well hyped before the release, since windows known for best user interface, good software support, more and more people are migrating to windows leaving Linux and Mac OS, presently about 91% of Computers are running Windows Operating system
There are so many reasons to upgrade from 7,8 to 10 since they had fixed several bugs and make the new windows more attractive and less vulnerable to attacks, as they had promised earlier to the users Windows 10 was free upgrade for users who are running windows 7,8 and 8.1. I would let you know the requirements for upgrading windows for 7 to 10 and how to do it
SYSTEM REQUIREMENTS FOR WINDOWS 10
1) You must need 1 GB RAM for 32 bit and 2 GB RAM for 64 bit
2) Hard Disk space is 16 GB for 32 bit and 20 GB for 64 bit
3) Graphics Card is Direct X 9.0
4) Display must be in 800×600
HOW TO UPGRADE FROM WINDOWS 7,8, to 10
1) First open the windows update section on your Computer, then check for Updates
2) If your System has latest version of Windows 7 SP1 and Windows 8.1 Latest update , it would ask you to upgrade for Windows 10
3) If you do not have latest versions, you need to download them and again check for updates in Computer
Download : Microsoft 7 SP 1
Download : Microsoft 8.1 Update
RUN MICROSOFT 10 TOOL IN PC
1) First Download the Microsoft 10 Tool Kit and then proceed to upgrade options
Download : 32 bit Tool Kit
Download : 64 bit Tool Kit
2) Run the Tool and Choose the Upgrade option of PC, it will start Downloading and we would get three options of what to do your Data
3) Select the keep both personal and data files so that everything would be same as after windows 10
4) Windows 10 Will start installing and after some time the customization would be over , now windows 7, 8 was fully upgraded to Windows 10
5) Agree to all the Microsoft terms and conditions after upgrading to windows 10
6) If you do not want to continue Windows 10 , go back to the Previous Versions by Settings > Update and Security > Go back to option Windows 7 or 8.1
7) Installation time mostly depends on the Internet Connection ,since if it works fast the installation would also go through quickly
Conclusion
Windows 10 upgrade was not Trial Version or Limited function Operating System, even you installed the Operating system from ISO the features remain same.