get-ciminstance "Cannot create a file when that file already exists"

just installed powershell 5 on w7sp1 box. wanted use examine installed programs. tried:

    get-ciminstance -classname win32_installedwin32program

that worked unsurprisingly gave long list lot of information didn't need, tried narrow down.

tried:

    get-ciminstance -classname win32_installedwin32program | get-object name

and gave error because (being new powershell) had tried get-object whereas should have been select-object.

so tried again, time using select-object , got:

get-ciminstance : cannot create file when file exists.
@ line:1 char:10
+ $progs = get-ciminstance -classname win32_installedwin32program
+          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + categoryinfo          : resourceexists: (root\cimv2:win32_installedwin32program:string) [get-ciminstance], cimex
   ception
    + fullyqualifiederrorid : hresult 0x800700b7,microsoft.management.infrastructure.cimcmdlets.getciminstancecommand

any time try using get-ciminstance -classname same error now.

tried using procmon pointing @ powershell process see happening file access see reading dlls.

totally confused. know problem or have suggestions how analyse?

get-ciminstance  win32_installedwin32program | select name

no problem on system. missing key piece of information in description.

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\_(ツ)_/

Windows Server  >  Windows PowerShell