I need a script to help me check all the AD Computers for a certain file.

Question

What I'm looking for is a script that I can use to check all the AD computers in my domain for a file that was created by Malware. It would be great if the script could export the results as a csv and have a column for the computer name, IP address, and
if the file/path exists.
I'm new to Powershell and I've been trying to script it on my own but no luck so far. I would be extremely great-full for any help, or a point in the right direction.
I messed around with different commands:
I'm not sure if I should be using test-path or get-childitem with recursive and wildcards.
This is a sample of what I'm working with... I know it probably horrible but like I said I'm new.
$date = [DateTime]::Today.AddDays(-90)
$AllComps = get-adcomputer -filter {(Enabled -eq 'true') -and (lastlogondate -gt $date)} | select name
$Allcomps = $AllComps[100..125]
foreach ($ADcomputer in $AllComps)
function check-remotefile {
    PROCESS {
                $file = "\\$_\C$\Windows\notepad.exe"
                if (test-path $file)
                echo "$ADcomputer: .exe exists"

Answer 1

You fail to ask a question.  What is it you do not know or understand?
Start simple and learn how to best post code:
$date=[DateTime]::Today.AddDays(-90)
Get-adcomputer -filter 'Enabled -eq $true -and lastlogondate -gt $date' |
Where{test-path "\\$($_.Name)\C$\Windows\notepad.exe"} |
ForEach-Object{echo "$($_.Name): .exe exists"}
Learn the basics. The pipeline is you friend.
¯\_(ツ)_/¯