Silent install of Office using a variable

Question

Hello I`ve wrote a script for installing programs directly from USB drive in powershell, but as before i used the just the paths so

start-process "D:\programs\program.exe" for ex.

everything was fine but then it stroke me that some computers might assign my USB Drive a different letter, therefore I`ve put up a variable "$P = volume | ? drivetype -eq removable | % driveletter" that gets the letter of currently plugged in USB (obviously working only when only one is in) but as all below command works

start-process "${P}:\programs\program.exe"

the issue I have is silent office install as with path projected it works
D:\office\setup.exe /configure D:\office\configuration.xml
with variable
${P}:\office\setup.exe /configure ${P}:\office\Configuration.xml

It doesn`t put the variable as the assigned letter and when i try to put the whole path into a variable it so for ex.
$D ="${P}:\office\setup.exe"
it says /configure is wrong
cannot user start-process cause /configure is also not working there, can someone please tell me what can i fix it?

Answer 1

Try this.

$cmd = "$($P):\office\setup.exe /configure $($P):\office\Configuration.xml"
$cmd
Invoke-Expression $cmd 

If you need the script to continue executing while setup.exe is also running, then try this.

Start-Process "$($P):\office\setup.exe" -ArgumentList  "/configure $($P):\office\Configuration.xml"

Answer 2

Found a solution simply before the silent install I`ve put

$P = volume | ? drivetype -eq removable | % driveletter

cd ${P}:\

\office\setup.exe /configure \office\configuration.xml

And now it works