rahul Ah, yes, sorry, you had already said it.
First, you will need to locate the php.ini file, following this instructions to find it:
Find the file php.ini in the xampp\php folder, or in the etc folder (not /etc but etc, within the xampp folder).
Then, add or uncomment the line extension=php_fileinfo.dll on php.ini, and restart Apache.
Please let me know if it works.