Internet Explorer 10 might have accidentally become unpinned. To pin it back to your Start screen, follow these steps:

1. Swipe in from the right edge of the screen, and then tap Search.
   (If you’re using a mouse, point to the upper-right corner of the screen, and then click Search.)
2. Enter Internet Explorer, and then tap or click Apps.
3. In the search results, swipe down on the Internet Explorer icon, and then tap Pin to Start.
   (If you’re using a mouse, right-click Internet Explorer, and then click Pin to Start.)

You might notice that there is not search box in Windows Store and find it’s difficult to see a way to search app in store. Here are steps:

1. WinKey + C to open the charms bar
2. Click or tap “Search”
3. Enter what you want to search for

Update: actually step #2 & 3 is not necessary, when you go to store, you can just start typing and search will automatically come up. You can even do same in the start screen!

Screenshot for searching OneNote in Store.

In Windows 8 You can configure IE10 to always open in the default Metro style or in Internet Explorer for the Desktop, as you prefer.

To configure the way links display in IE10 when you open them:

1. If you are using a Metro version of IE, when viewing a site in IE10, click Page Tools and select View on the desktop.
2. Click Tools, and select Internet options.
3. Click to display the Programs tab.
4. In the Opening Internet Explorer section, select the default option you desire from the menu, and then click OK.

There are 3 IE launch options.

Let Internet Explorer decide

This option will choose which version of IE to open depending on the context where the link was selected. Selecting a link from a Metro style-app will open the touch-optimized version of the browser. Selecting a link from an application or icon on the desktop will open the desktop version of the browser. This option is the default.

Always in Internet Explorer

Links from all apps, including desktop apps, will open in Metro version of IE.  The only exception here is IE icons and Internet shortcuts on the desktop.

Always in Internet Explorer on the desktop

Links from all apps, including Metro style-apps, will open Desktop version of IE.

Tiles are introduced by Microsoft to Windows Phone. Tiles allow user receive latest update on start menu, without the need to open the application. For example, a weather app could show you the latest forecast.

Tile is widely used in Windows 8 metro UI applications. For some metro application you don’t want notification show up in the start menu, you can right click to app, click (or touch) Turn live tile off.

It’s pretty hard to figure out how to reboot or shutdown Windows 8 only use mouse/keyboard. After a few hours search in Google, here comes all options I found. All of them work but involved too many steps. It sucks there is no one click shutdown shortcut.

• Hover the mouse over the lower right corner ( or WinKey + C),  in the right menu, Settings –> Power –> Sleep/Shutdown/Restart.
• In desktop mode, press Alt + F4.
• In user switch screen, highlight username, sign out and then shutdown.
• Running shutdown in cmd.
  • Shutdown: shutdown /s
  • Restart: shutdown /r

Feel free to comment if you found other options