i want to buy lightroom 5.7.1 in one year committment and if i uninstall it in few months as i'm going to replace or upgrade my desktop to better one,can i get access to my package or should i cancel the one year committment and purchase another one !?
You mean you want the CC Photography package with Lightroom and Photoshop??
When you change from one computer to another just uninstall from one and install on the other. You can have on tow computers at once. There would be no need to cancel your subscription and restart or buy a new one. The subscription works with your Adobe ID as the reference.