无法上传.exe / .msg文件，可以其他一切

Question

I'm running the following environment:

• PHP 7.1.7
• IIS 10
• Windows 10 1703
• Laravel 5.4.30

Here's my upload script (really simple, accepts all uploads):

public function uploadToTemporary(AttachmentUploadRequest $request)
{
    /** @var \Illuminate\Http\UploadedFile $file */
    $file = $request->file('file');

    return [
        'name' => $file->getClientOriginalName(),
        'location' => $file->store('temporary'),
    ];
}

My AttachmentUploadRequest rules:

public function rules()
{
    return [
        'file' => 'file|max:20000',
    ];
}

When I upload files with the extensions .msg, .exe, I receive:

(1/1) ErrorException fopen(C:\Users\Steve\Websites\tickets\storage\app\temporary/V4WslICBUK3TjK9Cn46nmKkXxtJVAGfDkxJiN9Lg.): failed to open stream: Permission denied

The thing is, I can upload every other type of file successfully. Here's the file extensions that upload successfully without any permission issues:

• .docx, .doc
• .pptx, .ppt
• .xlsx, .xls
• .txt
• .mp4, .avi, .mp3
• .pdf
• .vrd
• .jpg, .gif, .bmp

Does anyone know why this would happen?

EDIT: I verified that the files are being saved successfully in the temporary windows location by downloading a 1.1mb executable and uploading it:

Answer 1

Maybe some antivirus protection is blocking the action. Try disabling it temporarily.