Preventing desktop changes by users for a particular account??

[castorem]

For example I have a small company with a lab with compters and
intrenet access

I create accounts (those with icons that appear on firts Xp screen
with particular configurations each) when for employees, visitors, etc

How can I prevent those who entered XP Visitors account (clicking
Visitors icon) from :

1. Changing desktop configuration (resolution, image background, etc)

2. Installing programs.

3. Erasing desktop shortcuts or delete Explorer bookmarks, etc.

Thanks

 

[Joe]

Do some research on gpedit.msc. Also, make the permissions for your hard
drive read/list/execute for everyone but the administrator, or at least for
you guest account.

Joe