Look for authorized Adobe resellers. They might have copies of older software versions available for purchase.
A completely free, offline desktop tool that handles merging, splitting, and compressing PDFs without watermarks. acrobat x pro free download
To ensure your computer's security and to support software developers, always use official sources or authorized resellers. Look for authorized Adobe resellers
If you have a legitimate serial number from a past purchase, you might still be able to install it from your original media (CD-ROM). However, Adobe’s official download servers for Acrobat X have largely been decommissioned. offline desktop tool that handles merging
If you still wish to download Adobe Acrobat X Pro specifically, here are steps for finding a legitimate source: