Remote control in computing refers to the process that a technician or administrator connects to a computer that needs to be controlled from an offsite location via the Internet, displays its desktop environment to his own computer, and then performs various support and maintenance operations on the remote computer. With the popularity of Internet and technological innovations, remote control technology is increasingly being used in work and life. Remote control software can help us achieve remote assistance, telecommuting, and other purposes.

Firewall is the strongest line of defense in the system, also a barrier between the intranet and the extranet (Internet), and protects our computer by controlling the flow of packets in and out and preventing access by illegal users according to rules predefined by the system administrator. The built-in Windows Firewall is not only not powerful enough, but also difficult for the average computer users to configure and maintain (so few people use it). That's why there are many third-party firewall programs like simplewall.

The biggest killer of disk space is not large files, but duplicate files, such as photos, music, videos, eBooks, documents, etc. Large files are actually quite easy to find and clean up, but duplicate files are almost always scattered all over the disk and usually hard to find. It is obviously too inefficient and even impractical to find them one by one by manually comparing the names, sizes, contents and other attributes of a large number of files.

DSynchronize is a classic, small, and free file synchronization tool, developed by Dimio Software from Italy. It has simple and straightforward UI, very stable performance and perfect flow control, supports multiple synchronization modes (manual, real-time, bidirectional, timer, transactional), and can meet different users' requirements for file and folder synchronization and backup.

AppReadWriteCounter is a very simple but practical hard disk read and write monitoring tool developed by NirSoft. With it, you can quickly see the detail info about every application in your system that is reading and writing to the hard drive, and monitor that information in real time, so that any changes can be displayed in time. Like other NirSoft tools, it's free, tiny, portable, and very easy to use.