Windows Security, the earlier Windows Defender, is an app embedded into Windows 10/11 to protect your computer from viruses and malware. Windows Defender can provide real-time protection. To turn on Windows Defender in Windows 10, go to Settings > Update & Security > Windows Defender. Then, you can launch this security app from there. To open this app in Windows 11, follow the way in this post - How to Enable or Disable Microsoft Defender in Windows 11.

Many users complained that they got a message “You’ll need a new app to open this Windowsdefender link” when launching Windows Defender in some forums like Reddit.

This error can be found not only in Windows 10 but also in Windows 11. Nowadays Windows 11 is still in the test phase and it always has various issues with the release of each preview build. Recently, the error “You’ll need a new app to open this Windowsdefender link” bothers many Windows 11 users.

In many cases, you need to reinstall Windows 11.

For example, when your PC suffers a fault and fails to boot up, the common solution is to reset the PC. If blue screen of death (BSOD) errors always appear or the PC gets slow or hangs randomly, the safe option to mitigate downtime and loss of work is reinstalling Windows 11. The reinstallation of Windows can also reverse a fault update, driver update, or security patch.

Besides, if you decide to give away & sell your computer or want to get rid of bloatware and malware, reinstalling Windows is a good idea.

Remote desktop is a basic feature of the Windows operating system. It is designed to access your own or other’s computers remotely using the Remote Desktop Protocol (RDP). You can easily access files and programs on another computer remotely. Besides, you can use it to control a PC or offer assistance to someone without being present at that location.

To use remote desktop, two steps are required – enable remote desktop and set up or connect to the enabled device. How can you turn on remote desktop in Windows? It is easy in Windows 10 but for Windows 11, some settings are changed and the way is different. Now, let’s see how to enable Windows 11 remote desktop.

Windows Sandbox was first introduced in Windows 10 19H1 and now it is also a part of Windows 11. It is designed to create a secure environment to isolate running apps from the main systems, without accessing files, Windows registry, and critical parts of the main Windows system. That is, programs installed in Windows Sandbox keep "sandboxed" and run separately from the host machine.

This feature is fairly helpful, especially when you download an executable file or an app from risky sources and install it in Sandbox. This won’t damage your PC.

Sometimes you find your PC running Windows 11 gets slower and slower and one of the reasons for this is that the hard drive files are fragmented. Over time, files are saved, re-saved, or deleted, and small information packets are stored in random locations on the hard drive.

Since more and more data is written and deleted, more and more fragments are created. On the HDDs, these files take longer to find because the read head must move to various locations to access these files.

One reliable solution is defragmentation. This can eliminate the gap between files to avoid movement to offer fast reading and writing speed of your PC. Not only HDDs but also SSDs (just not as much frequently as HDDs) need defragmentation.

Well then, how to defrag a Windows 11 PC to get better PC performance? 3 ways are introduced below.