WSUS – Display Top Error Computers (PowerShell)

Find the top N computers with the most Windows Update failures in the last N days from WSUS, list their failed updates, and export results to CSV.

What the script does

Reads WSUS event history over a time window.
Aggregates errors per computer and shows the Top N.
Prints failed KB titles per machine.
Exports a CSV: WSUS_FailedComputers_YYYYMMDD.csv.

Requirements

Run on the WSUS server, in an elevated 64-bit PowerShell.
WSUS API available:
- UpdateServices module or
- "%ProgramFiles%\Update Services\Tools\Microsoft.UpdateServices.Administration.dll".

Usage

Save as Top-ErrorComputers.ps1, then run:

powershell.exe -NoProfile -ExecutionPolicy Bypass -File .\Top-ErrorComputers.ps1

Configuration

Edit the variables at the top of the script:

$Days – time window (default: 7)
$Top – number of computers to display (default: 10)
$OutCsv – export path

Output

Console table: ComputerName, IPAddress, Errors, LastError
CSV file at $OutCsv
For each “top” computer, a list of failed update titles is printed below the table.

Optional: schedule (Task Scheduler)

schtasks /Create /TN "WSUS Top Error Computers" ^
  /TR "powershell.exe -NoProfile -ExecutionPolicy Bypass -File C:\Scripts\Top-ErrorComputers.ps1" ^
  /SC DAILY /ST 02:00 /RU SYSTEM /RL HIGHEST /F

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