If your PC is running Windows 7 Home Basic or Home Premium, your files, programs and settings will easily transfer to Windows 8 Pro. If your PC is running Windows 7 Professional or Ultimate, Windows XP or Windows Vista, you will need to reinstall your programs. Some features such as touch may require a new PC. If you currently have a personal computer running Windows 7, Windows XP or Windows Vista then you can now upgrade to Windows 8 Pro (Professional). Using Windows 8 Pro you can connect and share your files, there are also enhanced features if you need to connect to company networks, access remote files, encrypt sensitive data, and other more advanced tasks. The new Windows 8 start screen is your personalised home for items you use the most and can be customised according to your user preferences. Windows 8 Live tiles provide real-time updates from your Facebook, Twitter, and e-mail accounts. Along with the new Start screen, the lock screen now includes e-mail, calendar, and clock widgets. To access your PC, Microsoft has replaced a standard PIN or password with a swipe gesture, unlock your PC by clicking or swiping present locations you’ve selected on the lock screen. New functions allow you to search for your favourite software programs, open, close, hide, resize, or run multiple apps simultaneously with the swipe of a finger or a swipe of the mouse. Windows has also made changes to make your PC more secure by boosting its existing security features and adding "Smart Screen," which acts to prevent suspicious programs or apps from being installed or running on your machine. Finally, Windows 8 also gives you the ability to "refresh" itself to give users a new starting point and a cleaner version of Windows.