Just noticed some interesting things you can find in the Windows environment variables:
| Environment Variable | Description |
| HOSTNAME | The hostname of the PC |
| PROCESSOR_IDENTIFIER | Text string describing what type of CPU you have. |
| WINDIR | What directory Windows is installed in. |
| PROCESSOR_ARCHITECTURE | What type of processor it is (x86) |
| ProgramFiles | The directory where Program Files are located (i.e. 'c:\Program Files') |
| USERDOMAIN | Your Windows networking domain |
| USERNAME | Your Windows networking username |
| USERPROFILE | What the current user's 'home directory' is |
| NUMBER_OF_PROCESSORS | How many CPUs are in the machine. |
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