In this video, you will learn how to fix the NSIS Error: "Error writing temporary file. Make sure your temp folder is valid" on any version of Windows — Windows 11, 10, 8, or 7. This error usually occurs when the installer can't access the TEMP folder, often due to folder corruption, permission issues, or antivirus interference.
✅ We cover 2 working methods to solve this NSIS error step by step:
Clearing and resetting the TEMP and TMP environment variables
Running the installer with proper admin permissions and fixing folder access
🛠️ Whether you're installing software like VLC, Python, Notepad++, or any other application and encounter this issue, these solutions will help you eliminate the NSIS installation error without using third-party tools.
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