can't seem to match two values in registry - powershell

Question

I am trying to get all the NICs on my system and then using that information to insert registry values of *TCPChecksumOffloadIPv4 etc. However, I am failing this task miserably!
I can get all the GUID's and want to match that to what is in this registry path: HKLM:\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}\*
I get all the GUID's by this:
$GuidSet = Get-ItemProperty "HKLM:\SYSTEM\CurrentControlSet\services\Tcpip\Parameters\Interfaces\*" | select -ExpandProperty pschildname
Output:
{1FE01120-3866-437F-81FF-556B08999AA4}
{2533855F-2A59-485D-87A0-167E5DA39E45}
{2A6471FB-C1D6-47D2-A665-9F276D142D7C}
{306D2DED-18B5-45D8-858E-BB3F49E3BD6A}
{30EF50B2-E4B3-400D-9614-B590E37DE4D8}
{4A208C06-0D99-4DE4-9B2F-86285AEF864E}
{B7883140-E15B-4409-BA1B-96E37A45425C}
{D129DDA8-C64B-46A1-B99A-EA74FC4FAF81}
{D5C9183B-E542-4010-866F-4443AD55F28C}
This is where I am stuck now...how can I use this information to match what is in the registry path of "HKLM:\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}\*" ?
I tried the below but I get access denied - I think this is because of the "Properties" registry key - how can I ignore that registry key?
$path1 = Get-ItemProperty "HKLM:\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}\*" |?{$_.NetCfgInstanceId -match $guidset} | select -ExpandProperty pspath
Once that is done though then do I construct a foreach loop on each entry and then add in the registry keys I need?
ANSWER:
you know what...when your in a muddle and you have lots of scripts...take a break, open a new window and start from scrath! That's what I did and in 10min I figured it out...!
$aGUID_SET = #(Get-ItemProperty "HKLM:\SYSTEM\CurrentControlSet\services\Tcpip\Parameters\Interfaces\*" | select -ExpandProperty pschildname)
Get-ItemProperty "HKLM:\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}\*" -exclude "Properties" |
Where-Object {$aGUID_SET.Contains($_.NetCfgInstanceId)} |
ForEach-Object {
""
$_.DriverDesc
$_.NetCfgInstanceId
}

Answer 1

You are on the right track.
The Get-ItemProperty cmdlet will only get the properties of the items specified, not including any sub-items.
Since the registry values you are looking for are not actually properties of the registry key HKLM:\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318} but instead are properties of subkeys of that key, the first thing we need to do is list the subkeys: $path = "HKLM:\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}"
We can then use Get-ChildItem $path to list the subkeys.
After formatting the paths properly (add Registry:: to the front), you can then input that to Get-ItemProperty. I would filter with something like: Where-Object {$guidset -contains $_.NetcfgInstanceID} | Select-Object -ExpandProperty PSPath.
Finally, you should have an array of paths to keys that matched $guidset, which
Set-ItemProperty can take.
EDIT: The error you are receiving is because permissions on those "Properties" subkeys is restricted. I would tack an -ErrorAction SilentlyContinue to Get-ChildItem because it is not a terminating error and does not actually affect the results.

Answer 2

You can do it like this
ForEach ($item in $(Get-ItemProperty "HKLM:\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}\*" |?{$_.NetCfgInstanceId -match $guidset} | select -ExpandProperty pspath)) {
Try {
Write-Host $item
} Catch {
Write-Host "error..."
}
}