Create a .reg file

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate]
"AcceptTrustedPublisherCerts"=dword:00000001
"ElevateNonAdmins"=dword:00000001
"TargetGroup"="XP Workstations"
"TargetGroupEnabled"=dword:00000001
"WUServer"="http://192.168.1.82:8530"
"WUStatusServer"="http://192.168.1.82:8530"

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU]
"AUOptions"=dword:00000004
"AUPowerManagement"=dword:00000001
"AutoInstallMinorUpdates"=dword:00000001
"DetectionFrequency"=dword:0000000a
"DetectionFrequencyEnabled"=dword:00000001
"IncludeRecommendedUpdates"=dword:00000001
"NoAUAsDefaultShutdownOption"=dword:00000001
"NoAUShutdownOption"=dword:00000001
"NoAutoRebootWithLoggedOnUsers"=dword:00000001
"NoAutoUpdate"=dword:00000000
"RebootRelaunchTimeout"=dword:0000000a
"RebootRelaunchTimeoutEnabled"=dword:00000001
"RescheduleWaitTime"=dword:0000000a
"RescheduleWaitTimeEnabled"=dword:00000001
"ScheduledInstallDay"=dword:00000000
"ScheduledInstallTime"=dword:00000003
"UseWUServer"=dword:00000001

To remove the content from the registry

Windows Registry Editor Version 5.00

[-HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate]

[-HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU]