Don't worry. Those who are either joking or are serious about having Ctrl, Alt and Del buttons (you know the need to have these three) will be dumb founded as Microsoft requires that Windows 8 PCs without a keyboard does need to implement Ctrl+Alt+Del sequence. Now, on to the more important requirements. The requirements are divided into three parts.
- System Requirements
- Device Requirements
- Filter Driver Requirements
Head here to download PDF documents that explain these requirements in detail. By 'detail', I mean details running into hundreds of pages. Head here if you don't want to spend the rest of your life trying to finish reading these documents.