---
title: "Troubleshooting COM Class Factory Errors in BizTalk360"
slug: "clsid-failed"
updated: 2026-11-05T06:45:38Z
published: 2026-11-05T06:45:38Z
canonical: "docs.biztalk360.com/clsid-failed"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.biztalk360.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Troubleshooting COM Class Factory Errors in BizTalk360

## Problem 1: Registry Key Marked for Deletion

You may encounter an error as shown below while accessing the application:

Retrieving the COM class factory for component with CLSID failed due to the following error: 800703fa Illegal operation attempted on a registry key that has been marked for deletion. (Exception from HRESULT: 0x800703FA)

#### Cause

This issue can occur when BizTalk360 is configured to run under a specific user account.

When the user logs off, Windows may unload the user's profile, including the associated registry keys. If the BizTalk360 application or one of its processes continues to access those registry keys, the application may encounter the **0x800703FA** error or the exception below.

![](https://cdn.document360.io/253f6006-3994-42d0-98cd-fdc637f51791/Images/Documentation/image-DW0X4XMV.png)

#### Solution

As a workaround, configure Windows not to forcefully unload the user's registry when the user logs off. You can enable the **Do not forcefully unload the user registry at user logoff** policy.

Follow these steps:

1. Open **Group Policy Editor** by running `gpedit.msc`.
2. Navigate to: **Computer Configuration → Administrative Templates → System → User Profiles**
3. Locate **Do not forcefully unload the user registry at user logoff**.
4. Select **Edit Policy Setting**.
5. Change the setting from **Not Configured** to **Enabled**.
6. Apply the changes.

![image.png](https://cdn.document360.io/253f6006-3994-42d0-98cd-fdc637f51791/Images/Documentation/image%28177%29.png)

Once enabled, Windows will not forcefully unload the user's registry during logoff and will wait until it confirms that no other processes are using the registry.

This policy adds the **DisableForceUnload** registry value.

![image.png](https://cdn.document360.io/253f6006-3994-42d0-98cd-fdc637f51791/Images/Documentation/image%28178%29.png)

> [!NOTE]
> As a standard recovery procedure, perform an **IIS reset** on the BizTalk360 server after applying the policy change.