There can be various reasons why you might encounter this error when writing to a temporary file in Python on Windows. Here are a few possible causes and solutions:

1. Insufficient permissions: Ensure that the user running the Python script has appropriate permissions to write to the specified temporary directory. Make sure the directory exists and the user has write access to it.

2. Antivirus or security software interference: Some antivirus or security software might restrict write access to certain locations, including temporary directories. Temporarily disabling such software or configuring it to allow the Python script to write to the temporary directory could resolve the issue.

3. File handle leakage: If you repeatedly open and write to temporary files without properly closing them, it can result in too many open file handles, causing resource exhaustion. Make sure to close the file handle explicitly using the close() method or by utilizing the with statement, as you have shown in your code snippet.

4. File path issues: Double-check that the path you are using for the temporary file is correct and valid. If the path contains any special characters or non-standard characters, it might cause issues.

If none of these solutions resolve the issue, please provide more details about your code and the specific steps you are taking that lead to the error. Additionally, if there are any relevant error messages or stack traces accompanying the error code, including those would be helpful in further diagnosing the problem.