Many people are already using Windows 8, and that means even more consumers are making the age-old decision about whether or not they should upgrade. We don’t care whether you upgrade or not, although there are some important changes between Windows 7 and Windows 8 that deserve to be mentioned.
All of the changes listed below will help optimize your PC in some way or another. Some of these changes will help make your PC faster, while others will help fix errors and other computer problems.

5) Secure boot

Have you ever had one of those pesky viruses that attacks as soon as your computer boots up? Like most people, we hate those viruses. Fortunately, Windows 8 will have a secure booting process that will prevent viruses like that from attacking your computer before it has time to defend itself. This boot process uses cryptographic signatures in order to verify that the operating system is genuine and has not been tampered with.
Access secure booting by going to the Charms bar > Change PC settings > General > Advanced startup

4) Check-disk utility

Check disk has been an important application in the last few versions of Windows. It’s used to fix file-system corruptions and solve all sorts of PC problems. Unfortunately, in past versions of Windows, the check-desk utility (also known as chkdsk) could only run on drives that were not currently active. So, if you wanted to remove corrupted files from the system you’re currently working on, then you had to watch this screen for several minutes as your computer slowly checked itself.
In Windows 8, chkdsk can run on the boot drive and any active drives. So, if you’ve encountered a PC problem, you can continue working while chkdsk scans your computer.

3) Solve multi monitor problems more easily

If you have ever tried to connect two different-sized monitors to your Windows computer in the past, then you know how difficult it can be to find the right layout. Windows just couldn’t figure out how to handle two monitors with different resolutions connected to the same computer, and forget about setting up desktop backgrounds that spanned across all the monitors.
Fortunately with Windows 8, Microsoft has recognized that more and more people are using multi-monitor setups. Windows 8 allows users to easily configure two monitors of any size and you can even setup unique wallpapers for each one. If you’re a multi-monitor user who has ever struggled to connect monitors in the past, then this will be a welcome change.

2) Fix Windows problems with a refresh or reset

One of the best ways to fix any computer problem is to reinstall or reformat your operating system. Unfortunately, this also wipes out your settings, programs, and any personal data you may have collected.
Microsoft has made it easier than ever to fix computer problems with Windows 8. Windows 8 includes a new ‘Refresh’ feature that allows users to reinstall Windows while keeping all of their personal data, interface settings, programs, and any other unique customizations. Windows will look exactly the same as it did before you Refreshed your system, although it should be faster and free of corruption following the reinstall.
Meanwhile, ‘Reset’ allows users to delete all of their user data and reinstall their operating system, which would speed up the PC even further.

1) Account Sync

Users who have more than one Windows 8 computer are in for a treat with the new account synching feature. Using account sync, Windows 8 will track whatever unique customizations you’ve made to your operating system across multiple PCs. That means your app settings, desktop themes, backgrounds, browser information, pictures, and all other information is immediately accessible from any Windows 8 computer. If you use a Windows 8 PC at work and at home, then this will undoubtedly be an incredibly useful feature.
Windows 8 has plenty of positives when it comes to fixing or speeding up a PC. But is it worth the $40 upgrade free? That’s for you to decide.