Get-WmiObject Win32_Product

[Keith Hill]

This query on Windows XP takes a long time and on Vista it fails in both
standard user and admin consoles:

1> Get-WmiObject Win32_Product

IdentifyingNumber : {8A7CAA24-7B23-410B-A7C3-F994B0944160}
Name : Microsoft Virtual PC 2007
Vendor : Microsoft Corporation
Version : 6.0.156.0
Caption : Microsoft Virtual PC 2007

Get-WmiObject : Generic failure
At line:1 char:14
+ Get-WmiObject <<<< Win32_Product

Any ideas what's going on here?

--
Keith

[Keith Hill]

"Keith Hill" <r_keit...@mailhot.nospamIdotcom> wrote in message
news:256A3BA9-BD1A-4815...@microsoft.com...

> This query on Windows XP takes a long time

On my XP machine at work it took:

6> measure-command { gwmi win32_Product > InstalledProducts.txt }

Days : 0
Hours : 0
Minutes : 2
Seconds : 23
Milliseconds : 674
Ticks : 1436742418
TotalDays : 0.00166289631712963
TotalHours : 0.0399095116111111
TotalMinutes : 2.39457069666667
TotalSeconds : 143.6742418
TotalMilliseconds : 143674.2418

For about 141 installed products. If I use the registry it takes far less
time:

15> $selectExpr = @{Expression={(Get-ItemProperty $_.PSPath
DisplayName).DisplayName};Name='DisplayName'}
16> measure-command { dir
HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall | Select
PSChildName,$selectExpr }

Days : 0
Hours : 0
Minutes : 0
Seconds : 1
Milliseconds : 439
Ticks : 14394848
TotalDays : 1.66607037037037E-05
TotalHours : 0.000399856888888889
TotalMinutes : 0.0239914133333333
TotalSeconds : 1.4394848
TotalMilliseconds : 1439.4848

Of course, I get a bunch of duplicate entries...

--
Keith

[Jeffrey Snover [MSFT]]

This is a known bug in Vista and is scheduled for a fix in SP1.

"Keith Hill" <r_keit...@mailhot.nospamIdotcom> wrote in message
news:256A3BA9-BD1A-4815...@microsoft.com...

--
Jeffrey Snover [MSFT]
Windows PowerShell Architect
Microsoft Corporation
This posting is provided "AS IS" with no warranties, no confers rights.
Visit the Windows PowerShell Team blog at:
http://blogs.msdn.com/PowerShell
Visit the Windows PowerShell ScriptCenter at:
http://www.microsoft.com/technet/scriptcenter/hubs/msh.mspx

[forestial]

For what it's worth: whatever is causing this to take a long time in XP, it
is not Powershell. I ran the equivalent WMI query using another tool and it
takes the same amount of time that way. While the query is running, the
process wmiprvse.exe is using all of one CPU on the machine.

The same seems to happen for several of the WMI classes related to this:
Win32_Product, Win32_ProductCheck, Win32_ProductResouce and
Win32_ProductSoftwareFeatures all take a surprisingly long time to complete.

[Keith Hill]

"forestial" <fore...@discussions.microsoft.com> wrote in message
news:D7D87879-EF27-4E0E...@microsoft.com...

> For what it's worth: whatever is causing this to take a long time in XP,
> it
> is not Powershell. I ran the equivalent WMI query using another tool and
> it
> takes the same amount of time that way. While the query is running, the
> process wmiprvse.exe is using all of one CPU on the machine.
>
> The same seems to happen for several of the WMI classes related to this:
> Win32_Product, Win32_ProductCheck, Win32_ProductResouce and
> Win32_ProductSoftwareFeatures all take a surprisingly long time to
> complete.
>

Thanks. It's good to know that PowerShell isn't at fault with this issue.

--
Keith

[forestial]

I tried it on a Vista x64 system, and it works as expected there. Still
takes a while, though - 32 seconds to list just 33 installed products, and
this is on a Core 2 Duo 2.8GHz machine with one of the cores going full bore
throughout the query.