If none of the potential boot menu keys identified in step 3 work or if the USB stick does not appear in the list, then try the second troubleshooting technique described below.
Similar problems might have been reported already for your model of computer in our list of known issues.
Word Press determines what method it will use to connect to the filesystem of your server based on the file ownership of your Word Press files.
If the files are owned by the owner of the current process (i.e., the user under which the web server is running), and new files created by Word Press will also be owned by that user, Word Press will directly modify the files all by itself, without asking you for credentials.
Once you are on the "Update Word Press" page, click the button "Update Now" to start the process off.
You shouldn't need to do anything else and, once it's finished, you will be up-to-date. If you have any problems, it is probably related to permissions issues on the filesystem.
Most sites are now able to automatically apply these updates in the background.
This means if there are any issues you can restore your website.If you experience problems with the Three Step Update, you may want to review the more detailed upgrade instructions For these instructions, it is assumed that your blog's URL is directories and sub-directories, and in the root directory (such as index.php, and so on). Be careful when you come to copying the wp-content directory.You should make sure that you only copy the files from inside this directory, rather than replacing your entire wp-content directory.Whether your files are owned by the web server user, or not, will depend on how you installed Word Press and how your server is configured.On some shared hosting platforms, it is a security risk for the files to be owned by the web server user and not a FTP user.