: Adobe recommends using the original installation CD or the backup installer you saved at the time of purchase, as they do not provide replacements for older versions. Alternative and Archive Sources
If you previously purchased Acrobat X Pro (perpetual license), follow these steps: adobe acrobat x pro 10.0 download
Officially compatible with older systems like Windows XP (SP3), Vista (SP2), and Windows 7. It is not guaranteed : Adobe recommends using the original installation CD