Webroot Spy Sweeper Spyware Protection Software Minimum System Requirements: Windows XP 32-bit SP1, SP2, SP3. Windows Vista 32-bit, SP1 32-bit, SP1 64-bit. 300 Mhz Processor, 100 MB Hard Drive, 256 MB Ram. Internet Explorer 5.5 or higher or Firfox 2.0 or higher for connectiong to webroot website.