First off, I know this is beta software. I have been using MS Antispyware since first introduced by Microsoft. I have recently downloaded the newest version (1.0.614) and it shows definitions version 5725. Every time I update the definitions (currently 5731) it installs without problem. However when I close out MS Antispyware (not the security agents), I then reopen it and it shows definition version 5725 again every time. For some reason the definitions are not being retained when I close the program. I have removed all references to MS Antispyware that I could think of and reinstalled with the same problem still occurring. Never had this problem with the older version. Is anyone else experiencing this issue or know how to resolve it?