Where to find the command prompt in windows?

Find command prompt: \\ComputerName\c$\WINDOWS\system32
It is the ipconfig.exe file.

Type in set in command prompt:
C:\Documents and Settings\jqiu-admin>set
ALLUSERSPROFILE=C:\Documents and Settings\All Users
APPDATA=C:\Documents and Settings\jqiu-admin\Application Data
CLIENTNAME=D735054T
ClusterLog=C:\WINDOWS\Cluster\cluster.log
CommonProgramFiles=C:\Program Files\Common Files
COMPUTERNAME=AXONREMOTE-K1
ComSpec=C:\WINDOWS\system32\cmd.exe
EXCHICONS=C:\Program Files\Exchsrvr\bin\maildsmx.dll
FP_NO_HOST_CHECK=NO
HOMEDRIVE=C:
HOMEPATH=\Documents and Settings\jqiu-admin
LOGONSERVER=\\WINDCP18
NUMBER_OF_PROCESSORS=2
OS=Windows_NT
Path=C:\Program Files\HP\NCU;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\
Wbem;C:\WINDOWS\system32\WindowsPowerShell\v1.0;C:\Program Files\System Center O
perations Manager 2007\;C:\Program Files\Windows Imaging\
PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.PSC1
PROCESSOR_ARCHITECTURE=x86
PROCESSOR_IDENTIFIER=x86 Family 15 Model 2 Stepping 5, GenuineIntel
PROCESSOR_LEVEL=15
PROCESSOR_REVISION=0205
ProgramFiles=C:\Program Files
PROMPT=$P$G
SESSIONNAME=RDP-Tcp#42
SystemDrive=C:
SystemRoot=C:\WINDOWS
TEMP=C:\DOCUME~1\JQIU-A~1\LOCALS~1\Temp\2
TMP=C:\DOCUME~1\JQIU-A~1\LOCALS~1\Temp\2
UATDATA=C:\WINDOWS\system32\CCM\UATData\D9F8C395-CAB8-491d-B8AC-179A1FE1BE77
USERDNSDOMAIN=INTERNAL.LOCAL
USERDOMAIN=INTERNAL
USERNAME=jqiu-admin
USERPROFILE=C:\Documents and Settings\jqiu-admin
windir=C:\WINDOWS

Look at what's under path then put it under envrionment -
A more permanent way to manage environment variables is provided in the System Properties dialog box. Open Control Panel-Performance and Maintenance-System (or right-click on My Computer and choose "Properties"). In the box that opens, click the "Advanced" tab to obtain the dialog box shown below. Next, click the button "Environment Variables".

For more information, click this link below:
http://vlaurie.com/computers2/Articles/environment.htm