# NR Fails to start server

**URL:** https://discourse.nodered.org/t/nr-fails-to-start-server/69050
**Category:** General
**Created:** [14 October 2022 22:51 UTC](https://discourse.nodered.org/t/nr-fails-to-start-server/69050 "2022-10-14T22:51:38Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![ArtS](https://avatars.discourse-cdn.com/v4/letter/a/7cd45c/32.png) [@ArtS](https://discourse.nodered.org/u/ArtS)
#### Post date: [14 October 2022 22:51 UTC](https://discourse.nodered.org/t/nr-fails-to-start-server/69050/1 "2022-10-14T22:51:38Z")

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I installed NR on Windows 11 and run it successfully for the first time. After installing and reinstalling couple of modules the NR does not start any more. I got following errors:

14 Oct 18:41:31 - [info]

# Welcome to Node-RED

14 Oct 18:41:31 - [info] Node-RED version: v3.0.2  
14 Oct 18:41:31 - [info] Node.js version: v16.18.0  
14 Oct 18:41:31 - [info] Windows\_NT 10.0.19044 x64 LE  
14 Oct 18:41:31 - [error] Failed to start server:  
14 Oct 18:41:31 - [error] Error: spawn Unknown system error -536606512  
at ChildProcess.spawn (node:internal/child\_process:420:11)  
at spawn (node:child\_process:733:9)  
at Object.execFile (node:child\_process:331:17)  
at C:\Users\Art\AppData\Roaming\npm\node\_modules\node-red\node\_modules@node-red\registry\lib\installer.js:581:27 at new Promise ()  
at Object.checkPrereq (C:\Users\Art\AppData\Roaming\npm\node\_modules\node-red\node\_modules@node-red\registry\lib\installer.js:580:16)  
at Object.load (C:\Users\Art\AppData\Roaming\npm\node\_modules\node-red\node\_modules@node-red\registry\lib\index.js:59:22)  
at C:\Users\Art\AppData\Roaming\npm\node\_modules\node-red\node\_modules@node-red\runtime\lib\index.js:146:29

Please help.

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### Author: ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [14 October 2022 22:57 UTC](https://discourse.nodered.org/t/nr-fails-to-start-server/69050/2 "2022-10-14T22:57:03Z")

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> [@ArtS](#):
>
> After installing and reinstalling couple of modules the NR does not start any more. I got following errors:

Clearly some node you installed is problematic. What nodes did you install?

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### Author: ![ArtS](https://avatars.discourse-cdn.com/v4/letter/a/7cd45c/32.png) [@ArtS](https://discourse.nodered.org/u/ArtS)
#### Post date: [14 October 2022 23:20 UTC](https://discourse.nodered.org/t/nr-fails-to-start-server/69050/3 "2022-10-14T23:20:22Z")

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I installed node-red-contrib-uibuilder, node-red-dashboard, and one of the opcua ones. Since then I removed the modules, that did not help, so then I removed node-red. cleared cache, deleted files from C:\Users\Art.node-red folder and C:\Users\CZV3JP\AppData\Roaming\npm, and reinstalled node-red. I guess these were not proper steps, so I ended up with node-red not starting.

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### Author: ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)
#### Post date: [13 December 2022 23:20 UTC](https://discourse.nodered.org/t/nr-fails-to-start-server/69050/4 "2022-12-13T23:20:30Z")

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