按照论坛里下载好了离线文件更新时出错，
提示：
installing documentation files ...   
D:\Program Files\Stata15\docs\g.pdf is locked.
Perhaps the file is open in a PDF viewer on your system.  Resolve the problem and update again.
r(608);
可我这个文件一直没打开，显示占用，该怎么解决？求各位大神