Applicable Products: Notebook, Desktop, All-in-One PC, Gaming Handheld   Installing multiple antivirus programs at the same time can slow down the system, cause errors, and may lead to the risk of protection mechanisms failing due to conflicts between antivirus software. Therefore, it is not recommended to install multiple antivirus programs on the same device. If you already have antivirus software installed on your device and wish to install another antivirus program, it is advisable to completely remove the original antivirus software before installing the new one.   Installing multiple antivirus programs may lead to the following issues, which may not appear immediately but are potential risks: Antivirus Conflicts: When an antivirus program updates, it might be mistakenly identified as suspicious or malicious activity by other antivirus software, which may attempt to block its operation. Duplicate Threat Detection: Since each antivirus software has its own virus definitions and malware databases, they might interfere with each other when detecting the same malicious file, leading to repeated alerts. Unnecessary Consumption of System Resources: If multiple antivirus programs are performing scans, updates, and other operations simultaneously, it can impose an additional burden on system speed. Reduced System Stability: Due to the reasons mentioned above, the system may become unstable and in severe cases, could even lead to a Blue Screen of Death (BSOD) error.   If you are uncertain about which antivirus programs are installed on your system, please refer to this article: How to Check if Your Device Has Antivirus Software Installed. Should you wish to uninstall an antivirus application, you might find a dedicated uninstaller on the software's official website, or you could employ the built-in uninstallation method provided by Windows (Windows Settings > Apps > Installed apps). For more detailed instructions, please refer to this article: How to Uninstall Applications.