This step tell you how to open Celculator Keyboard in Window 7.
2. Troubleshoot problems
If some part of Windows 7 is behaving strangely, and you don't know why, then click Control Panel > Find and fix problems (or 'Troubleshooting') to access the new troubleshooting packs. These are simple wizards that will resolve common problems, check your settings, clean up your system and more.
3. Take control
Tired of the kids installing dubious software or running applications you'd rather they left alone? AppLocker is a new Windows 7 feature that ensures users can only run the programs you specify. Don't worry, that's easier to set up than it sounds: you can create a rule to allow everything signed by a particular publisher, so choose Microsoft, say, and that one rule will let you run all signed Microsoft applications. Launch GPEDIT.MSC and go to Computer Configuration > Windows Settings > Security Settings > Application Control Policies > AppLocker to get a feel for how this works.
4. Startup repair
If you've downloaded Windows 7 (and even if you haven't) it's a good idea to create a system repair disc straight away in case you run into problems booting the OS later on. Click Start > Maintenance > Create a System Repair Disc, and let Windows 7 build a bootable emergency disc. If the worst does happen then it could be the only way to get your PC running again.
5. Create and mount VHD files
Microsoft's Virtual PC creates its virtual machine hard drives in VHD files, and Windows 7 can now mount these directly so you can access them in the host system. Click Start, type diskmgmt.msc and press Enter, then click Action > Attach VHD and choose the file you'd like to mount. It will then appear as a virtual drive in Explorer and can be accessed, copied or written just like any other drive.
Click Action > Create VHD and you can now create a new virtual drive of your own (right-click it, select Initialise Disk, and after it's set up right-click the unallocated space and select New Simple Volume to set this up). Again, you'll be left with a virtual drive that behaves just like any other, where you can drag and drop files, install programs, test partitioning software or do whatever you like. But it's actually just this VHD file on your real hard drive which you can easily back up or share with others. Right-click the disk (that's the left-hand label that says "Disk 2" or whatever) and select Detach VHD to remove it.
The command line DISKPART utility has also been upgraded with tools to detach a VHD file, and an EXPAND command to increase a virtual disk's maximum size. Don't play around with this unless you know what you're doing, though - it's all too easy to trash your system.
6. Problem Steps Recorder
As the local PC guru you're probably very used to friends and family asking for help with their computer problems, yet having no idea how to clearly describe what's going on. It's frustrating, but Microsoft feels your pain, and Windows 7 will include an excellent new solution in the Problem Steps Recorder.
When any app starts misbehaving under Windows 7 then all your friends need do is click Start, type PSR and press Enter, then click Start Record. If they then work through whatever they're doing then the Problem Steps Recorder will record every click and keypress, take screen grabs, and package everything up into a single zipped MHTML file when they're finished, ready for emailing to you. It's quick, easy and effective, and will save you hours of troubleshooting time.
7. Burn images
Windows 7 finally introduces a feature that other operating systems have had for years - the ability to burn ISO images to CDs or DVDs. And it couldn't be much easier to use. Just double-click the ISO image, choose the drive with the blank disc, click Burn and watch as your disc is created.
8. Switch to a projector
Windows 7 now provides a standard way to switch your display from one monitor to another, or a projector - just press Win+P or run DisplaySwitch.exe and choose your preferred display. (This will have no effect if you've only one display connected.)
9. Easily set screen resolution
Choosing a new screen resolution used to involve locating and browsing through the Display Properties applet. Windows 7 made this far simpler, though - just right-click an empty part of the desktop, select Screen Resolution and you'll immediately see the appropriate options.
10. Control devices and printers
Device Manager is a powerful tool for managing hardware, but it's also rather technical and intimidating, which is probably why Windows 7 has introduced a more basic alternative in the Devices and Printers applet.
The first improvement is purely visual, with lengthy and cryptic device names replaced by large icons for major hardware items only (monitor, mouse, hard drive, printer and so on).
11. Automatically switch your default printer
Windows 7's location-aware printing allows the operating system to automatically switch your default printer as you move from one network to another.
To set this up, first click Start, type Devices, and click the Devices and Printers link.
Select a printer and click Manage Default Printers (this is only visible on a mobile device, like a laptop - you won't see it on a PC).
Choose the Change My Default Printer When I Change Networks option, select a network, the default printer you'd like to use, and click Add.
Repeat the process for other networks available, and pick a default printer for each one.
And now, as you connect to a new network, Windows 7 will check this list and set the default printer to the one that you've defined.
