Two clicks from is the XP Shutdown article.

Here's what you'll have to note. There is no "do this" to cure your issue. As to the ROXIO software, you may be unaware that WMP (Windows Media Player) can install a piece of that for you without you knowing. To pass up a fix because you haven't installed Roxio may have left a fix untried.

Ooops, that's the magic word. You have to "try" each fix.