You install the same way you did the 1st time... put your disc in the drive and enter your serial number when asked, or download the installer and enter your serial number when asked
kglad links in reply #1 here https://forums.adobe.com/thread/2478335 to download program installers
--ignore the original question, you need to go to kglad's links in reply #1
-you will need to enter your original serial number during install for non-Cloud programs
When you have a non-functioning computer and can't deactivate a serial number
BE SURE TO ONLY ASK FOR ACTIVATION SUPPORT TO ADJUST YOUR ACTIVATION COUNT
Adobe ID and registration support (non-CC) http://helpx.adobe.com/x-productkb/global/service-c1.html
You don't say your version, so ignore these if they don't apply to you
CS3 and Acrobat 8 activation server is retired see reply #1 https://forums.adobe.com/thread/2372929
-you MUST use the special serial number AND the special installer you download, not your originals
-above includes a link to get the special version AND links to help with activation problems
-more information on activation problems with the new version https://forums.adobe.com/thread/2385900
CS2 + Acrobat 7 + Audition 3 (AND EARLIER) Activation Server is gone, so read below
https://helpx.adobe.com/creative-suite/kb/cs2-product-downloads.html?promoid=19SCDRQK
You MUST use the special version and serial number on the page, not your original disc or serial number