Installed softare without GUID

Hi All,

We have an installed software on our PC's that don't have a guid. This means that when we try uninstall the product using powershell:

$app = Get-WmiObject -Class Win32_Product | Where-Object {
    $_.Name -match "Software Name"
}
$app.Uninstall()

the uninstall fails as it cannot find the product.

Is there a way we can manually assign a guid to the installed software?

also is there another way we can uninstall the product?

thank you in advance
Kelly GarciaSenior Systems AdministratorAsked:
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deroodeSystems AdministratorCommented:
When you find the uninstall string in the registry, go from there; If it is an MSI you can uninstall silent with msiexec /x {productcode} /QB, if the product has it's own uninstaller try to figure out if it has any command line options.

Can you give a hint about what software you are trying to uninstall?
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xtermieCommented:
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Dr. KlahnPrincipal Software EngineerCommented:
Use the freeware version of Revo uninstaller in hunter mode.
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deroodeSystems AdministratorCommented:
If the software was not installed using an msi package you won't be able to uninstall it with $app.Uninstall(); Try locating the software in "Programs and Features",

If it can be found there you can find the uninstall string in the registry somewhere under HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall or HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
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Kelly GarciaSenior Systems AdministratorAuthor Commented:
we have to uninstall it from 400 machines
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Kelly GarciaSenior Systems AdministratorAuthor Commented:
therefore we are trying to automate this process
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