diff --git a/.github/workflows/build-win.yml b/.github/workflows/build-win.yml
index 88a04ce..9e4016e 100644
--- a/.github/workflows/build-win.yml
+++ b/.github/workflows/build-win.yml
@@ -57,9 +57,11 @@ jobs:
             $psql_opt = "--bindir"
           }
 
-          if ("$pg_version" -eq "14") {
-            & "C:\Program Files\PostgreSQL\14\uninstall-postgresql.exe" --mode unattended 2>&1 | Out-Default
-            Remove-Item -Recurse -Force "C:\Program Files\PostgreSQL\14"
+          # Uninstall existing PostgreSQL installation in windows-latest (windows-2025) runner
+          # https://github.com/actions/runner-images/blob/main/images/windows/Windows2025-Readme.md#postgresql
+          if ("$pg_version" -eq "17") {
+            & "C:\Program Files\PostgreSQL\17\uninstall-postgresql.exe" --mode unattended 2>&1 | Out-Default
+            Remove-Item -Recurse -Force "C:\Program Files\PostgreSQL\17"
           }
 
           "PG_VERSION=$pg_version" >> $env:GITHUB_ENV
@@ -96,25 +98,39 @@ jobs:
         run: |
           $ErrorActionPreference = "Stop"
 
-          Stop-Service -Name "postgresql$env:X64-$env:PG_VERSION"
+          $serviceName = "postgresql$env:X64-$env:PG_VERSION"
+          $pgData = "C:\pgdata"
+          $pgPort = "55432"
+
+          $env:PGPORT = $pgPort
+          $env:PGHOST = "localhost"
+          $env:Path = "$env:PG_ROOT\bin;$env:Path"
+
+          if (Get-Service -Name $serviceName -ErrorAction SilentlyContinue) {
+            Stop-Service -Name $serviceName -Force -ErrorAction SilentlyContinue
+            & "$env:PG_ROOT\bin\pg_ctl.exe" unregister -N "$serviceName" 2>&1 | Out-Default
+            Start-Sleep -Seconds 2
+          }
+          Remove-Item -Recurse -Force "$pgData" -ErrorAction SilentlyContinue
 
           Copy ".\$env:RELEASE_DIR\temporal_tables.dll" "$env:PG_ROOT\lib"
           Copy ".\*.sql" "$env:PG_ROOT\share\extension"
           Copy ".\*.control" "$env:PG_ROOT\share\extension"
 
           Set-Content -path pg.pass -value $env:PGPASSWORD -encoding ascii
-          & "$env:PG_ROOT\bin\initdb.exe" -A md5 -U postgres --pwfile=pg.pass C:\pgdata 2>&1 | Out-Default
-          & "$env:PG_ROOT\bin\pg_ctl.exe" register -S demand -N "postgresql$env:X64-$env:PG_VERSION" -D c:\pgdata 2>&1 | Out-Default
+          & "$env:PG_ROOT\bin\initdb.exe" -A md5 -U postgres --pwfile=pg.pass "$pgData" 2>&1 | Out-Default
+          & "$env:PG_ROOT\bin\pg_ctl.exe" register -S demand -N "$serviceName" -D "$pgData" -o "-p $pgPort" 2>&1 | Out-Default
 
-          Start-Service -Name "postgresql$env:X64-$env:PG_VERSION"
+          Start-Service -Name "$serviceName"
 
           Get-ChildItem "$env:PG_REGRESS"
-          & "C:\Program Files\PostgreSQL\17\lib\pgxs\src\test\regress\pg_regress.exe" --help 2>&1 | Out-Default
 
           & "$env:PG_REGRESS" "$env:PSQL_OPT=$env:PG_ROOT\bin" --dbname=pl_regression install no_system_period invalid_system_period no_history_table no_history_system_period invalid_types invalid_system_period_values versioning versioning_custom_system_time structure uninstall 2>&1 | Out-Default
 
           if ($LASTEXITCODE -ne 0) {
-            Get-Content -Path ".\regression.diffs" | Out-Printer
+            if (Test-Path -Path ".\regression.diffs") {
+              Get-Content -Path ".\regression.diffs" | Out-Host
+            }
             Write-Error "Tests failed"
           }
         env: