我尝试创建一个在我的客户端计算机上运行的脚本，并检查挂起的重新启动。如果有挂起的重新启动，则会弹出一条消息，要求用户重新启动或推迟。当我在我的本地计算机上尝试它时，这很好用。但是，一旦我将它放入System Center并进行部署，它就不会运行并且我得到错误＆＃34;警告：你不能在空值表达式上调用方法＆＃34;有任何想法吗？这是脚本
[CmdletBinding()]
param(
[Parameter(Position=0,ValueFromPipeline=$true,ValueFromPipelineByPropertyName=$true)]
[Alias("CN","Computer")]
[String[]]$ComputerName="$env:COMPUTERNAME",
[String]$ErrorLog
)
Begin
{
# Adjusting ErrorActionPreference to stop on all errors, since using [Microsoft.Win32.RegistryKey]
# does not have a native ErrorAction Parameter, this may need to be changed if used within another
# function.
$TempErrAct = $ErrorActionPreference
$ErrorActionPreference = "Stop"
}#End Begin Script Block
Process
{
Foreach ($Computer in $ComputerName)
{
Try
{
# Setting pending values to false to cut down on the number of else statements
$PendFileRename,$Pending,$SCCM = $false,$false,$false
# Setting CBSRebootPend to null since not all versions of Windows has this value
$CBSRebootPend = $NULL
# Querying WMI for build version
$WMI_OS = Get-WmiObject -Class Win32_OperatingSystem -Property BuildNumber, CSName -ComputerName $Computer
# Making registry connection to the local/remote computer
$RegCon = [Microsoft.Win32.RegistryKey]::OpenRemoteBaseKey([Microsoft.Win32.RegistryHive]"LocalMachine",$Computer)
# If Vista/2008 & Above query the CBS Reg Key
If ($WMI_OS.BuildNumber -ge 6001)
{
$RegSubKeysCBS = $RegCon.OpenSubKey("SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\").GetSubKeyNames()
$CBSRebootPend = $RegSubKeysCBS -contains "RebootPending"
}#End If ($WMI_OS.BuildNumber -ge 6001)
# Query WUAU from the registry
$RegWUAU = $RegCon.OpenSubKey("SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update\")
$RegWUAURebootReq = $RegWUAU.GetSubKeyNames()
$WUAURebootReq = $RegWUAURebootReq -contains "RebootRequired"
# Closing registry connection
$RegCon.Close()
# Determine SCCM 2012 Client Reboot Pending Status
# To avoid nested 'if' statements and unneeded WMI calls to determine if the CCM_ClientUtilities class exist, setting EA = 0
$CCMClientSDK = $null
$CCMSplat = @{
NameSpace='ROOT\ccm\ClientSDK'
Class='CCM_ClientUtilities'
Name='DetermineIfRebootPending'
ComputerName=$Computer
ErrorAction='SilentlyContinue'
}
$CCMClientSDK = Invoke-WmiMethod @CCMSplat
If ($CCMClientSDK)
{
If ($CCMClientSDK.ReturnValue -ne 0)
{
Write-Warning "Error: DetermineIfRebootPending returned error code $($CCMClientSDK.ReturnValue)"
}#End If ($CCMClientSDK -and $CCMClientSDK.ReturnValue -ne 0)
If ($CCMClientSDK.IsHardRebootPending -or $CCMClientSDK.RebootPending)
{
$SCCM = $true
}#End If ($CCMClientSDK.IsHardRebootPending -or $CCMClientSDK.RebootPending)
}#End If ($CCMClientSDK)
Else
{
$SCCM = $null
}
# If any of the variables are true, set $Pending variable to $true
If ($CBSRebootPend -or $WUAURebootReq -or $SCCM)
{
$Pending = $true
}#End If ($CBS -or $WUAU)
If ($Pending = $CBSRebootPend -or $WUAURebootReq -or $SCCM)
{
$a = new-object -comobject wscript.shell
$b = $a.popup(“A Reboot is Pending, Press ""OK"" to reboot now or ""Cancel"" to reboot later.“,240,”CRISTA IT”,1)
if($b -eq 1) {
Restart-Computer
}
if($b -eq 2) {
#cancle was selected in the box. So should exit
exit(1)
}
}
}#End Try
Catch
{
Write-Warning "$Computer`: $_"
# If $ErrorLog, log the file to a user specified location/path
If ($ErrorLog)
{
Out-File -InputObject "$Computer`,$_" -FilePath $ErrorLog -Append
}#End If ($ErrorLog)
}#End Catch
}#End Foreach ($Computer in $ComputerName)
}#End Process
End
{
# Resetting ErrorActionPref
$ErrorActionPreference = $TempErrAct
}#End End
请注意：我没有完全创建这个脚本，但是在线使用了不同的免费脚本来创建它。