This is what the book says:
Removing or changing programs.
To remove or change settings on a troublesome program, follow these steps:
1. Choose the Control Panel from the Start menu and choose Programs and Features from the Programs area.
The Uninstall or Change a Program window appears, listing your currently installed programs, their publisher, size, and the date you installed the program.
2.Click the unloved program and then click its Uninstall, Change, or Repair button.
The Uninstall button always appears on the menu bar. Other buttons, called Change, and Repair appear only for some programs. If you spot the Repair or Change button, click it: Vista tries to repair the program or change some of its components. It sometimes fixes malfunctioning programs, but you often need its original CD handy.
3. When Windows asks whether you're sure, click Yes.
Windows Vista summons the program's built-in uninstall program - if it has one - or simply yanks the program off your computer's hard drive, sometimes rebooting your PC in the process.
Be careful, though. After you delete a program, it's gone for good unless you kept its installation CD. Unlike other deleted items, deleted programs don't linger inside your Recycle Bin.
End of quotation. The book has some more information on this topic - When a Program Doesn't Have an Installation Program - but I thought that you might like to have this to be going on with. I'll now make a start on typing out the When a Program Doesn't ... information and I'll send it as a separate answer. Best of luck.