Why can't I get Win32_UninterruptiblePowerSupply to work?

Question

I have some simple code:

ManagementObjectSearcher searcher = 
    new ManagementObjectSearcher("select * from Win32_UninterruptiblePowerSupply");

ManagementObjectCollection items = searcher.Get();

foreach (ManagementObject item in items)
{
    // Some code here...
}

The "items" object is semi-null. It's actually an object, but a call to .Count or anything else throws an exception.

I do have a standard USB-compliant UPS hooked up, this is Windows 7, and I'm using Visual Studio 2010 on a 64-bit machine. I did add a manifest and requireAdministrator too.

Other WMI classes work, but this one doesn't. I'm out of ideas - help!

Answer 1

Well from the MSDN documentation for Win32_UninterruptiblePowerSupply it states that:

Beginning with Windows Vista, this class is obsolete and not available because the UPS service is no longer available. This service worked with serially attached UPS devices, not USB devices.