if the add/remove programs does not exist, then

<code>msiexec /X {0C16B7BE-0473-4345-B182-E61A209699D4} /quiet</code>

from an elevated ''cmd'' prompt

<WRAP center round info 60%>
The ''GUID'' it's not guaranteed to be universal across all versions or installations.
</WRAP>


You can verify what's installed on a particular system using:

  Get-WmiObject Win32_Product | Where-Object { $_.Name -like "*Site24x7*" } | Select-Object Name, IdentifyingNumber

Or more reliably (and faster) using the registry:

<code powershell>
Get-ChildItem "HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall" |
  ForEach-Object { Get-ItemProperty $_.PSPath } |
  Where-Object { $_.DisplayName -like "*Site24x7*" } |
  Select-Object DisplayName, UninstallString
</code>