The Shrew Soft VPN Client is compatible with PCs running Windows 2000, Windows XP/XP, Windows Vista, Windows 7 or Windows 8 with network connectivity via an Ethernet or Dial-up adapter. It is designed to be very lightweight an require minimal disk, memory and CPU resources. For this reason, the minimum requirements for the host operating system should be sufficient to support normal software operation. Testing has only been performed on machines running with the latest service packs installed. For this reason, you are encouraged to keep your operating system up to date when using this software.