Every time I turn off the computer and turn it on, junk software is automatically installed.

Dear, when you browse the web or download software, there may be bound junk plug-ins that are forcibly installed. These things will run in the background, occupy memory, and take up network speed. Ordinary uninstallation cannot completely uninstall it, because it will be implanted in the registration list and will appear again. It is recommended that you disinfect the virus first and then clean it thoroughly.

I recommend downloading and installing Tencent Computer Manager to solve the problem.

Open Tencent Computer Manager--Antivirus--Full Scan--Complete

Open Tencent Computer Manager---Software Management--Software Uninstall--Clear Residual Files and Residual Registry--Complete

It is also recommended that you always turn on the firewall

Open Computer Manager → Toolbox →Click ARP Firewall→Click Status→Enabled

Tencent Computer Manager is a free and professional security software that integrates a series of auxiliary computers such as garbage cleaning, computer acceleration, vulnerability repair, software management, and computer clinics. Management functions meet the dual needs of users for anti-virus protection and security management. It can effectively prevent and solve common security risks on computers. The pioneering 2-in-1 "management + antivirus" function relies on Host Cloud Scan and Kill and the second-generation independently developed anti-virus engine "Eagle Eye", Antivir Butler System Repair Engine and Kingsoft Cloud Scan and Kill Engine. It has performed even better in terms of phishing fraud and account crackdowns. Its capabilities in security protection and virus killing have reached the same level as world-class anti-virus software, and can fully protect computer security. Tencent Computer Manager has created the best results in domestic anti-software and is also China's first security software with 2-in-1 anti-virus and optimized management functions. Hope my answer helps you.

^_^