Web Programming

What is the difference between XML, XSL, XSD?The content of these files are looks similar, what is the difference between them and how they are used?

I have lost necessary privileges for my root user in xampp mysql.
How do I reset the privileges?
But the sites are working properly because I have other username with all permissions.
But the mysql phpMyAdmin page loads with root user as default.
Hence, I am not able to access databases from phpmyadmin.
How to reset the change the default login user name in phpMyAdmin or how to reset the permissions to the root user?

How to start XAMPP?
I already installed IIS on my computer. I want to use XAMPP. But it could not start. I think it is conflicting with ports. How to solve it?

Go to control panel --> Administrative tools --> Services --> select IIS Admin --> Right click -->stop this service
Then start the XAMPP control panel . Start Appache, MySql one by one. If you want to know services with conflicting with XAMPP, click the Port-Check button in the control panel of XAMP.

When I copied a website (asp) from virual folder in windows xp to Windows 7 the following error appears..
i.e., Transferring files asp files from IIS 5.1 to IIS 7.5

Server.MapPath() error 'ASP 0175 : 80004005'

Disallowed Path Characters

dbconnect.asp, line 3

The '..' characters are not allowed in the Path parameter for the MapPath method.