It is a monitoring tool designed for Microsoft Windows.
It can monitor hundreds of system information in a fully skinnable way.
With this tool, you can check in realtime all kinds of system information.
Here is a very short list of what you can get:

- cpu load (idle time, interrupt time, priviledge time, user time, etc.)
- memory load (available Mb, cache info, page faults, etc.)
- network load (bytes received/sent, packets info, datagram info, etc.)
- physical disk info (disk read/write time, idle time, avg transfer, etc.)
- LAN and WAN addresses.
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etc.

You can free download WinSystemXP now.