this is from help and suport in xp m8 best i can do for you.

To delete a user account
Open Computer Management.
In the console tree, click Users.
Where?

Computer Management
System Tools
Local Users and Groups
Users
Right-click the user account you want to delete, and then click Delete.
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if that dont work for you <> go to start <> help + support <> then in the search box typ delete accounts .. best of luck m8