WordPress Error xampp\htdocs\wp-includes\Requests\Transport\cURL.php on line 463

C:\xampp\htdocs\wp-includes\Requests\Transport\cURL.php on line 463

Solution: 

1. locate the file [XAMPP Installation Directory]\php\php.ini (e.g. C:\xampp\php\php.ini)
2. open php.ini in Notepad or any Text editor
3. locate the line containing max_execution_time and
4. increase the value from 30 to some larger number (e.g. set: max_execution_time = 90)
5. then restart Apache web server from the XAMPP control panel

If there will still be the same error after that, try to increase the value for the max_execution_time further more.

Or

@Raphael your solution does work. I encountered the same problem en solved it by increasing the maximum execution time to 180. There is an easier way to do it though:

1. Open the Xampp control panel
2. Click on 'config' behind 'Apache'
3. Select 'PHP (php.ini)' from the dropdown -> A file should now open in your text editor
4. Press ctrl+f and search for 'max_execution_time', you should fine a line which only says
   max_execution_time=30
5. Change 30 to a bigger number (180 worked for me), like this:
   max_execution_time=180
6. Save the file
7. 'Stop' Apache server
8. Close Xampp
9. Restart Xampp
10. 'Start' Apache server
11. Update Wordpress from the Admin dashboard