I just visited their site. They may have discontinued that trial version as I could find no reference to it. That would have been a good opportunity. Let me know if I missed something there.
Try ABBYY Products for free!
http://download.abbyy.com/content/default.aspx
http://finereader.abbyy.com/?param=137544
ABBYY FineReader 9.0 Professional EditionTry&Buy
The program will run for 15 days starting from the day of installation. During the trial period, you can process up to 50 pages in total and save or send to an external application only one page at a time.
If you are satisfied with the Try&Buy version, you can buy a full license and turn the trial version into a fully functional version of ABBYY FineReader 9.0.
System Requirements
PC with 1GHz processor or higher
Microsoft® Windows® Vista, Microsoft® Windows® Server 2003, Windows XP, Windows 2000 SP2 or higher (for working with localized interfaces, corresponding language support is required.).
512 MB of RAM, plus 512 MB of RAM for each additional processor core
250 MB of hard-disk space for typical installation and 512 MB of hard-disk space for program operation
TWAIN or WIA-compliant scanner, digital camera or fax-modem (optional)
XGA (1024x768) or higher-resolution video adapter and monitor
Keyboard, mouse or other windows-compatible pointing device
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