Bumping threads is a 'no-no' from a courtesy point of view. Although there are many 'members' here, there are only a few active 'answerers'. On this board, its 2 or 3 volunteers scattered around the world. Most have active demanding jobs in IT/Development and contribute their time freely. But they also have to eat, sleep, talk to their families and friends etc.
1st - have you you validated that the ServerRoot as found in the \xampp\apache\httpd.conf is actually a readable device?
2nd. Did you relocate XAMPP by any chance, or add drives to your system?
Good Luck Well - Altrea just beat me to it...