Windows 7 path environment variable deleted

Here's mine, found in ..

Control Panel\System and Security\System\Advanced System Settings\System Properties ..

User Variables

TEMP = %USERPROFILE%\AppData\Local\Temp
TMP = %USERPROFILE%\AppData\Local\Temp

System Variables

ComSpec = %SystemRoot%\system32\cmd.exe
FP_NO_HOST_CHECK = NO
NUMBER_OF_PROCESSORS = 8 (Cores And Virtual Cores)
OS = Windows_NT
PATH = C:\Program Files\Common Files\Microsoft Shared\Windows Live;C:\Program Files (x86)\Common Files\Microsoft Shared\Windows Live;c:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;%SYSTEMROOT%\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\Windows Live\Shared

This is for a x64 system, if yours is x86, then you won't need c:\Program Files (x86), it should just be c:\Program Files

PATHEXT = .COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC
PSModulePath = %SystemRoot%\system32\WindowsPowerShell\v1.0\Modules\
TEMP = %SystemRoot%\TEMP
TMP = %SystemRoot%\TEMP
USERNAME = SYSTEM
windor = %SystemRoot%