Get Processor Utilization Percentage

Get-WmiObject win32_processor -ComputerName $computer | Measure-Object -property LoadPercentage -Average | 
    Select @{Label = "Computer"; Expression = {$computer}},@{Label = "CpuUsage"; Expression = {$_.Average}}
Details
Returns the total percentage of process ultization on your local or remote system.

Example
PS C:\> $computer = 'localhost'
>> Get-WmiObject win32_processor -ComputerName $computer | Measure-Object -property LoadPercentage -Average |
>>     Select @{Label = "Computer"; Expression = {$computer}},@{Label = "CpuUsage"; Expression = {$_.Average}}


Computer  CpuUsage
--------  --------
localhost       15
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