[ShaddyR]

Сохранить следующее как var.cmd

Код:

md %systemdrive%\Temp
reg add "HKLM\SYSTEM\ControlSet001\Control\Session Manager\Environment" /v "TEMP" /t REG_SZ /d %temp% /f
reg add "HKLM\SYSTEM\ControlSet001\Control\Session Manager\Environment" /v "TMP" /t REG_SZ /d %temp% /f
reg add "HKCU\Environment" /v "TMP" /t REG_SZ /d %temp% /f
reg add "HKCU\Environment" /v "TEMP" /t REG_SZ /d %temp% /f

альтернативный вариант - var.reg

Код:

Windows Registry Editor Version 5.00 

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Session Manager\Environment]
"TEMP"="c:\\temp"
"TMP"="c:\\temp"

[HKEY_CURRENT_USER\Environment]
"TEMP"="c:\\temp"
"TMP"="c:\\temp"