If you've ever done any serious Windows troubleshooting, you've no doubt come across a freeware utility or two by Sysinternals...
...you can point your browser to http://live.sysinternals.com/ for no-nonsense access to any Sysinternals tool. Even better, though, you can open up Windows Explorer and point it to
\\live.sysinternals.com\to browse and launch any Sysinternals app as though you've already downloaded and installed it on your computer. That means next time you're doing tech support for friends and you forgot your PC Rescue Kit, you can quickly get to any Sysinternals tool for help.