這個reg檔，請問它每列功能？

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\WPA\MedCtrUpg]
"IsLegacyMCE"=dword:00000000

[HKEY_LOCAL_MACHINE\SYSTEM\WPA\MediaCenter]
"Installed"=dword:00000001

[HKEY_LOCAL_MACHINE\SYSTEM\WPA\PIDRange]
"SKURange"="EHome"

[HKEY_LOCAL_MACHINE\SYSTEM\WPA\PnP]
"seed"=dword:90db7866


[HKEY_LOCAL_MACHINE\SYSTEM\WPA\TabletPC]
"Installed"=dword:00000001