# V2.3.0.1 Failed to load Windows Component VanaraVssBackup **URL:** \ **Category:** Support\ **Created:** [May 16, 2026, 7:04pm UTC](https://forum.duplicati.com/t/v2-3-0-1-failed-to-load-windows-component-vanaravssbackup/22405 "2026-05-16T19:04:12Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Geek4eye](https://forum.duplicati.com/letter_avatar_proxy/v4/letter/g/b9e5f3/32.png) [@Geek4eye](https://forum.duplicati.com/u/Geek4eye)\ **Post date:** [May 16, 2026, 7:04pm UTC](https://forum.duplicati.com/t/v2-3-0-1-failed-to-load-windows-component-vanaravssbackup/22405/1 "2026-05-16T19:04:12Z")
Got two warnings this morning. The first is about VSS not loading and the second is a file open result of the first which is the active db file for the job. Snapshots are set to ON for this job. The first has happened on each run since being installed a few days ago. Environment is Windows 10 21H2 IOT (the one still supported). This pc had Duplicati 2.0.1.8 on it before. I’d tried 2.1 when it was first released a year ago, but abandoned it and reverted to the beta which works fine for me. V2.3.0.1 was loaded after a (mostly?) full removal of the prior versions (may have missed ProgramData) while keeping the .json and .sqlite files for the backup job set. It seem to be mostly working, with this one exception and a port 8300 oddity. I know nothing about VSS really, but I found some commands and will paste their output below. **Duplicati logs:** ================================== 2026-05-16 04:40:00 -07 - [Warning-Duplicati.Library.Main.Operation.BackupHandler-SnapshotFailed]: Failed to create a snapshot: Failed to load Windows Component VanaraVssBackup: Exception has been thrown by the target of an invocation. NotImplementedException: Failed to load Windows Component VanaraVssBackup: Exception has been thrown by the target of an invocation. ================================== 2026-05-16 04:40:00 -07 - [Warning-Duplicati.Library.Main.Operation.Backup.FileBlockProcessor.FileEntry-FileLocked]: Excluding path due to file locked: C:\Duplicati\_DB\HTPC5brW10\AFDUUROXRM-HTPC5brW10\_BUofDupDBs.sqlite-shm IOException: The process cannot access the file because another process has locked a portion of the file. : ‘\?\C:\Duplicati\_DB\HTPC5\AFDUUROXRM-HTPC5brW10\_BUofDupDBs.sqlite-shm’. ================================== **Windows commands:** Microsoft Windows [Version 10.0.19044.7291] (c) Microsoft Corporation. All rights reserved. C:\WINDOWS\system32\>vssadmin list shadowstorage vssadmin 1.1 - Volume Shadow Copy Service administrative command-line tool (C) Copyright 2001-2013 Microsoft Corp. Shadow Copy Storage association For volume: (C:)\?\Volume{00024d99-0000-0000-0000-903e00000000} Shadow Copy Storage volume: (C:)\?\Volume{00024d99-0000-0000-0000-903e00000000} Used Shadow Copy Storage space: 4.95 GB (2%) Allocated Shadow Copy Storage space: 5.25 GB (2%) Maximum Shadow Copy Storage space: 10.0 GB (4%) C:\WINDOWS\system32\>vssadmin list help vssadmin 1.1 - Volume Shadow Copy Service administrative command-line tool (C) Copyright 2001-2013 Microsoft Corp. Error: Invalid command. -— Commands Supported ---- Delete Shadows - Delete volume shadow copies List Providers - List registered volume shadow copy providers List Shadows - List existing volume shadow copies List ShadowStorage - List volume shadow copy storage associations List Volumes - List volumes eligible for shadow copies List Writers - List subscribed volume shadow copy writers Resize ShadowStorage - Resize a volume shadow copy storage association C:\WINDOWS\system32\>vssadmin list Providers vssadmin 1.1 - Volume Shadow Copy Service administrative command-line tool (C) Copyright 2001-2013 Microsoft Corp. Provider name: ‘Microsoft Software Shadow Copy provider 1.0’ Provider type: System Provider Id: {b5946137-7b9f-4925-af80-51abd60b20d5} Version: 1.0.0.7 C:\WINDOWS\system32\>vssadmin list Writers vssadmin 1.1 - Volume Shadow Copy Service administrative command-line tool (C) Copyright 2001-2013 Microsoft Corp. Writer name: ‘Task Scheduler Writer’ Writer Id: {d61d61c8-d73a-4eee-8cdd-f6f9786b7124} Writer Instance Id: {1bddd48e-5052-49db-9b07-b96f96727e6b} State: [1] Stable Last error: No error Writer name: ‘VSS Metadata Store Writer’ Writer Id: {75dfb225-e2e4-4d39-9ac9-ffaff65ddf06} Writer Instance Id: {088e7a7d-09a8-4cc6-a609-ad90e75ddc93} State: [1] Stable Last error: No error Writer name: ‘Performance Counters Writer’ Writer Id: {0bada1de-01a9-4625-8278-69e735f39dd2} Writer Instance Id: {f0086dda-9efc-47c5-8eb6-a944c3d09381} State: [1] Stable Last error: No error Writer name: ‘System Writer’ Writer Id: {e8132975-6f93-4464-a53e-1050253ae220} Writer Instance Id: {3bd6c43e-e933-4c50-b2b0-bf44fc2cf263} State: [1] Stable Last error: No error Writer name: ‘MSSearch Service Writer’ Writer Id: {cd3f2362-8bef-46c7-9181-d62844cdc0b2} Writer Instance Id: {9a995f46-88c5-4fd4-9f9e-4ae60910da45} State: [1] Stable Last error: No error Writer name: ‘ASR Writer’ Writer Id: {be000cbe-11fe-4426-9c58-531aa6355fc4} Writer Instance Id: {5b4888b7-f9b3-40bd-bce9-f72cf0319bd8} State: [1] Stable Last error: No error Writer name: ‘Registry Writer’ Writer Id: {afbab4a2-367d-4d15-a586-71dbb18f8485} Writer Instance Id: {c5577970-df12-47fb-bbc1-2cb35afb4452} State: [1] Stable Last error: No error Writer name: ‘WMI Writer’ Writer Id: {a6ad56c2-b509-4e6c-bb19-49d8f43532f0} Writer Instance Id: {b92dbae2-8e4d-4326-9e20-ebd10cd53bdd} State: [1] Stable Last error: No error Writer name: ‘Shadow Copy Optimization Writer’ Writer Id: {4dc3bdd4-ab48-4d07-adb0-3bee2926fd7f} Writer Instance Id: {2ec19b60-1929-441a-b755-4b515279f34d} State: [1] Stable Last error: No error Writer name: ‘COM+ REGDB Writer’ Writer Id: {542da469-d3e1-473c-9f4f-7847f01fc64f} Writer Instance Id: {7d376903-607c-4ac7-a640-cb8000205631} State: [1] Stable Last error: No error ---
**Author:** ![Geek4eye](https://forum.duplicati.com/letter_avatar_proxy/v4/letter/g/b9e5f3/32.png) [@Geek4eye](https://forum.duplicati.com/u/Geek4eye)\ **Post date:** [May 17, 2026, 1:59am UTC](https://forum.duplicati.com/t/v2-3-0-1-failed-to-load-windows-component-vanaravssbackup/22405/2 "2026-05-17T01:59:15Z")
**User Error.** On reading the Document web pages for the Nth time I noticed: > “For simplicity, most users prefer to [run Duplicati as a service](https://docs.duplicati.com/platform-specific-guides/using-duplicati-with-windows#running-the-server-as-a-windows-service), which will run in the LocalSystem account that already has the SeBackupPrivilege set.” where earlier they talked about VSS needing SeBackupPrivilege. Having said that, a more salient Warning would be to say that the VSS feature is unavailable due to insufficient permissions and recommend using the Service, rather than indicating that a module is missing. This reminds me of a VMware ESXi error that was pages long indicating a dire server hardware failure when the actual problem was a write-locked SD card. I haven’t figured out yet how to make the Tray Icon to attach to the Service because the instructions for getting the Service password are too cryptic for me so far. ---
**Author:** ![kenkendk](https://forum.duplicati.com/user_avatar/forum.duplicati.com/kenkendk/32/5305_2.png) [@kenkendk](https://forum.duplicati.com/u/kenkendk)\ **Post date:** [May 18, 2026, 6:19am UTC](https://forum.duplicati.com/t/v2-3-0-1-failed-to-load-windows-component-vanaravssbackup/22405/3 "2026-05-18T06:19:43Z")
> [@Geek4eye](#): > > Having said that, a more salient Warning would be to say that the VSS feature is unavailable due to insufficient permissions and recommend using the Service, rather than indicating that a module is missing. Thanks for the suggestion, that will be in the next release. > [@Geek4eye](#): > > where earlier they talked about VSS needing SeBackupPrivilege. That depends on your operation mode. If you just want it to work, running as a service is “good enough”. If you want to minimize permissions, you just need SeBackupPrivilege. ---
**Author:** ![kenkendk](https://forum.duplicati.com/user_avatar/forum.duplicati.com/kenkendk/32/5305_2.png) [@kenkendk](https://forum.duplicati.com/u/kenkendk)\ **Post date:** [May 18, 2026, 6:21am UTC](https://forum.duplicati.com/t/v2-3-0-1-failed-to-load-windows-component-vanaravssbackup/22405/4 "2026-05-18T06:21:24Z")
> [@Geek4eye](#): > > I haven’t figured out yet how to make the Tray Icon to attach to the Service because the instructions for getting the Service password are too cryptic for me so far. The easy way is to simply set the password in the service. If you know the password, then you can type it for TrayIcon. With 2.3 it will now ask for the password and save it securely so you only need to do it once.