error msh when I attemp to install Share Point

[JESSIE]

Ineed help on this please!

When I attemp to install Share Point Team services after
I enter the database server, username and password team
services tried to install but i'm getting this error msg

"SHARE POINT TEAM SERVICES FAILED TO PROVISION DEFAULT
WEBSITE. YOU HAVE ENTERED INCORRECT INFORMATION.
SPECIFIED VIRTUAL SERVER CANNOT BE EXTENDED BY SHARE
POINT.TO FIX THE PROBLEM REMOVE SHAREPOINT FORM YOUR
SERVER"

How can I remove it if I can't get t install the program?