# Installer fails on Windows because of old installation

**URL:** <https://forum.acestream.media/t/installer-fails-on-windows-because-of-old-installation/3987>\
**Category:** Questions, proposals and requests\
**Created:** [11.Январь.2026 21:11:00 UTC](https://forum.acestream.media/t/installer-fails-on-windows-because-of-old-installation/3987 "2026-01-11T21:11:00Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Martin\_Todorov](https://forum.acestream.media/user_avatar/forum.acestream.media/martin_todorov/32/3110_2.png) [@Martin\_Todorov](https://forum.acestream.media/u/Martin_Todorov)\
**Post date:** [11.Январь.2026 21:11:00 UTC](https://forum.acestream.media/t/installer-fails-on-windows-because-of-old-installation/3987/1 "2026-01-11T21:11:00Z")

</div>

Ace\_Stream\_Media\_3.2.8.exe

```auto
Ace Stream Media 3.2.8 Setup

You have already installed Ace Stream.
You must remove the old version before installing the new one. Please follow these steps:

Close all web browsers.

Close Ace Engine HD, if it is running. To do this, move the cursor to the icon of the plugin in the system tray, click it with the right mouse button, and then select menu «Exit».

Uninstall the old version of the plugin. You can do this from Control Panel, from the Start Menu under Ace Stream section, or by manually running Uninstall.exe from the folder where Ace Stream was installed.

WARNING! Before installing the new version of the plugin, please ensure that the folder in which older version was installed is absolutely empty.

```

I accidentally deleted %appdata%AceStream\ folder and then tried running the installer but it fails.

I already tried cleaning registry and folder leftovers but it still fails.

```auto
# AceStream full cleanup script
# Run as Administrator

Write-Host "Stopping AceStream services (if present)..."

# Common AceStream service name (may vary by version)
$services = @(
    "ace_engine",
    "AceStream Engine"
)

foreach ($svc in $services) {
    Get-Service -Name $svc -ErrorAction SilentlyContinue | Where-Object {$_.Status -ne "Stopped"} | Stop-Service -Force
    sc.exe delete $svc 2>$null
}

Write-Host "Killing running AceStream processes..."

$processes = @(
    "ace_engine",
    "ace_player",
    "acestream"
)

foreach ($proc in $processes) {
    Get-Process -Name $proc -ErrorAction SilentlyContinue | Stop-Process -Force
}

Write-Host "Removing program files..."

$paths = @(
    "$Env:ProgramFiles\AceStream",
    "$Env:ProgramFiles(x86)\AceStream",
    "$Env:APPDATA\ACEStream",
    "$Env:LOCALAPPDATA\ACEStream",
    "$Env:LOCALAPPDATA\Temp\ACEStream"
)

foreach ($path in $paths) {
    if (Test-Path $path) {
        Remove-Item -Recurse -Force -Path $path
    }
}

Write-Host "Removing registry entries..."

$regKeys = @(
    "HKCU:\Software\ACEStream",
    "HKCU:\Software\AceStream",
    "HKLM:\Software\ACEStream",
    "HKLM:\Software\AceStream",
    "HKLM:\Software\WOW6432Node\ACEStream",
    "HKLM:\Software\WOW6432Node\AceStream"
)

foreach ($key in $regKeys) {
    if (Test-Path $key) {
        Remove-Item -Recurse -Force -Path $key
    }
}

Write-Host "Removing firewall rules (if any)..."

Get-NetFirewallRule | Where-Object {
    $_.DisplayName -like "*AceStream*" -or $_.Program -like "*acestream*"
} | Remove-NetFirewallRule -ErrorAction SilentlyContinue

Write-Host "Checking scheduled tasks (name may vary)..."

Get-ScheduledTask -ErrorAction SilentlyContinue | Where-Object {
    $_.TaskName -like "*AceStream*"
} | Unregister-ScheduledTask -Confirm:$false

Write-Host "AceStream cleanup completed."
Write-Host "A reboot is recommended."

```

Any help?

---

<div class="post-metadata">

**Author:** ![Benny](https://forum.acestream.media/letter_avatar_proxy/v4/letter/b/49beb7/32.png) [@Benny](https://forum.acestream.media/u/Benny)\
**Post date:** [12.Январь.2026 01:51:03 UTC](https://forum.acestream.media/t/installer-fails-on-windows-because-of-old-installation/3987/2 "2026-01-12T01:51:03Z")

</div>

> [@Martin\_Todorov](#):
>
> Any help?

Check under “Programs and components“ (or “HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall“ section in registry) - there should be no any mentions about “Ace Stream“. If so - use any third-part tools that can delete such records (ccleaner, for example) or delete with “regedit” manually.

> [@Martin\_Todorov](#):
>
> accidentally deleted %appdata%AceStream\ folder

This folder/files from it can be manually restored - Ace Stream installer is self-extracting archive with some control scripts, which can be opened with any advanced archiver (7-zip, for example).

---

<div class="post-metadata">

**Author:** ![Martin\_Todorov](https://forum.acestream.media/user_avatar/forum.acestream.media/martin_todorov/32/3110_2.png) [@Martin\_Todorov](https://forum.acestream.media/u/Martin_Todorov)\
**Post date:** [25.Январь.2026 08:39:50 UTC](https://forum.acestream.media/t/installer-fails-on-windows-because-of-old-installation/3987/3 "2026-01-25T08:39:50Z")

</div>

thanks, that seemed to fix it (I was on a hunt in the registry and deleted several entries)