PowerShell CAN do it, but it's through invoking COM objects and sending keys to the window, so it's not the BEST way to do it. I'm going to repost something I posted yesterday to a similar question about using PowerShell to uninstall some unwanted software.
QFT:
PowerShell isn't going to interact with the prompts... you can't just tell it to click "Next" in an executable because it can't see it.
You can send keys to it though. You're really just using COM objects.
So, first, get your process ID by setting a variable that contains an array, the data for which is defined by the name of your process. Let's say your process is called, "Uninstall" and the process is ALREADY RUNNING:
$a = Get-Process | ?{$_.Name -eq "Uninstall"}
Start the COM:
$wshell = New-Object -ComObject wscript.shell;
Bring the uninstallation program with this process ID to the front so we can send it keystrokes:
$wshell.AppActivate($a.id)
Give it a few seconds to bring that window forward. I chose 5, but if your machine isn't stressed, 2 is probably enough:
Start-Sleep 5
Now start telling it what keys you want to send. The syntax here is this: whatever is in the () is what will be sent. The position in the single-quote is the keystroke to send, after the comma is how long you want it to wait before proceeding. Assuming the first screen is "Next" you can send your first command by telling PowerShell to send the ENTER key and wait 5 seconds:
$wshell.SendKeys('~',5)
The wait function is optional, but for your purposes, you're definitely going to want it. (If you don't want it $wshell.SendKeys('~') would send the ENTER key and immediately move to the next command.)
Walk through the uninstallation yourself manually, using all keystrokes, and for any keystroke you send, pay attention to how long it takes before the next part of uninstallation is loaded, and wait longer than that with your script (e.g. if it processes your ENTER key instantaneously, I'd have it wait 3 or 5 seconds before it sends the next command. If it takes 5 seconds to load, I'd tell it to wait 10 seconds before sending the next command).
Letters are letters, and numbers are numbers. Most non-commands are just assigned to their keys (meaning if you want to type "K" your command would just be $wshell.SendKeys('K')) You can get the rundown for the specific keys here: https://msdn.microsoft.com/en-us/library/office/aa202943(v=office.10).aspx.
/QFT
You may want to look into Auto-It, but that's based on pixel, last I checked, so if you run it on machines with different screen resolution, it can cause problems.
