A two part answer.
We start with the $key from the registry:
$path = 'hkcu:\Software\Microsoft\Windows\CurrentVersion\Extensions'
$key = Get-Item $path
$key
$key | Get-MemberSince $key is a Microsoft.Win32.RegistryKey, you cannot get the name value pairs out directly.
The first step is to create a list of PSCustomObjects with Name/Value pairs. The Name comes from the GetValueNames piped through a ForEach-Object. For each of those Names, we get the Value through GetValue:
$namevalues = $key.GetValueNames() |
ForEach-Object {
[PSCustomObject] @{
Name = $_;
Value = $key.GetValue($_)
}
}
$namevalues | Format-TableAn alternative for the first step is to use the Select-Object using -ExpandProperty as explained byScott Saad:
$namevalues = $key | Select-Object -ExpandProperty Property |
ForEach-Object {
[PSCustomObject] @{
Name = $_;
Value = $key.GetValue($_)
}
}
$namevalues | Format-TableThe second step is to filter the $namevalues either by Name or by Value.
The Where-Object has some pretty cool Comparison operators that accept regular expressions likematch, notMatch, etc.
To make the code more readable, you can wrap lines (thanks Joey!) either use the backtick (`) or take advantage of the places in the PowerShell syntax where it does accept line breaks, like after a pipe (|) or opening brace ({):
$matches = $namevalues |
Where-Object {
$_.Name -match '^xls' `
-or $_.Value -match 'msaccess.exe$'
}
$matches | Format-TableThe result is as wanted:
Name Value
---- -----
xlsx C:\PROGRA~2\MICROS~1\Office15\EXCEL.EXE
xls C:\PROGRA~2\MICROS~1\Office15\EXCEL.EXE
mdb C:\PROGRA~2\MICROS~1\Office15\MSACCESS.EXE
mda C:\PROGRA~2\MICROS~1\Office15\MSACCESS.EXE
The Wiert Corner - irregular stream of stuff 
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