Two tips to make your computer safer and enhance computer security

“Computer Virus” is a set of computer instructions or program code inserted by programmers into a computer program that disrupts computer functionality or data, can affect computer usage, and can self replicate

Unlike “viruses” in medicine, computer viruses are not innate. They are a set of instructions or program codes compiled by some people using the inherent vulnerabilities of computer software and hardware. They lurk in the storage medium (or program) of the computer through some means, and are activated when certain conditions are met. By modifying other programs, they can place their precise copies or possible evolutionary forms into other programs, infecting other programs and damaging computer resources. The so-called virus is artificially caused and poses great harm to other users!!!

For example, the “Eternal Blue” that emerged in 2017 exploited the SMB vulnerability in the Windows system to obtain the highest system privileges. Later, criminals mutated the “Eternal Blue” to produce the “wannacry” ransomware. At that time, multiple university internal networks, large enterprise internal networks, and government agency private networks in the UK, Russia, and China were recruited and extorted to pay a high ransom (worth about $300 in Bitcoin) in order to decrypt and recover files.

The attack method of “Eternal Blue” is to scan a Windows machine with an open port of 445, and users may be at risk of being caught as long as they turn on the internet. Of course, we can reduce the probability of being invaded by malicious code by closing unnecessary services and ports, and setting computer permissions.

Next, demonstrate two simple techniques to reduce the probability of a computer being invaded by malicious code.

1、 Close unnecessary ports
Press WIn+r in the Win10 system and enter gpedit.msc to open the local group policy editor.

Find the IP security policy under the security settings under Windows settings in the local group policy. Right click to create a new IP security policy to close unnecessary ports.

If it is Win10 Home Edition, it is recommended to enter the following code:

Then modify the extension to. cmd format. Right click on the file and run it as an administrator. When the system displays the following interface:

(It is recommended to restart the computer here) Then enter gpedit.msc in the runtime window to enter local group policy management.

2、 Preventing Local Area Network Infection of Malicious Code through System Sharing
Find the management tools in the control panel, click Services ->Stop the server and Task scheduler services.

Click on View Network Status and Tasks under Network and Internet in the control panel, change the advanced sharing settings, and change the configuration to turn off network sharing and file and printer sharing.

Open File Explorer, select the option from the toolbar menu, and remove the check mark before using the sharing wizard.

Next, enter regedit in the runtime window to enter the registry editor. Go to the computer’s \ HKEY-LOCAL_Machine \ SYSTEM \ CurrentControlSet \ Services \ LanmanServer \ Parameters key, and create a new DWORD value with a key value of Autoshareserver and a key value of 0. This will prevent sharing of partitions such as C, D, and E.

Reducing the probability of a computer being invaded by malicious code by closing unnecessary services and ports, setting computer permissions, is just a relatively simple technical measure that requires more security measures (such as professional hardware/software) to better prevent the intrusion of malicious code.

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