High Quality Content by WIKIPEDIA articles! XOFTspy Portable Anti-Spyware is a proprietary application developed by ParetoLogic Inc. for Microsoft Windows computers. The portable anti-spyware program is designed to protect roaming users from malicious threats. ParetoLogic Inc. has become the first vendor to offer an antispyware tool for use from portable U3 USB drives While the software is free to download and scan, the user must purchase a license at $14.95 to clean. The license is valid to clean multiple computers from the same U3 USB drive.