If you go into the "xampp" folder and run "xampp-control.exe" (XAMPP Control Panel), are any of the services still running? You will probably need to stop them before you can remove the folder. Also, make sure the "svc" column to the left of each item is NOT ticked. Exit the XAMPP control Panel and see if you can remove the folder.
HI Here is request that you could plz inform me compatibility of joomla and xampp versions. I got error message on joomla web creation line99 errors. Thank you in advance. viswam DS