If our software still show the unregister state for you after you buy and register it, please check the following two points.

1. Is it the right date and time of your computer? You may adjust the date and time of Windows OS by double clicking the lower right corner of your desktop.

2. Is there mass temp files in your computer? These files are usually lying in the C:\Windows\Temp or C:\User\User\Local Settings, etc. You may remove them using this tool.
    http://soft.aboter.com/download/ClearTempFile.zip

Our software products, including Abot Email Searcher, Abot Group Mail Professional, and other email marketing software, work normally in varies systems, including Windows XP, 2003, Win7, etc.