STEP 1: Check if your computer is running the 32-bit or 64-bit version of Windows. OPTION 4: Make Sure You Are Installing the Right Version for Your Operating System NOTE: If the minimum system requirement was met, proceed to the next option. STEP 2: Consider upgrading your computer if it doesn’t meet the minimum system requirements. You may visit the Microsoft Security Essentials website to check this. STEP 1: Make sure your computer meets the minimum system requirements for Microsoft Security Essentials. OPTION 3: Verify that the Computer Meets the Minimum System Requirement for Microsoft Security Essentials If this did not resolve the problem, proceed to the next option. STEP 8: Try installing Microsoft Security Essentials again. STEP 7: When the Administrator: Command Prompt window appears, enter “MSIEXEC /REGSERVER” then press. STEP 6: Right-click Command Prompt, then click Run as administrator. Enter “command prompt” in the Search programs and files field. If the Start button is grayed out, click the Stop button, and then click the Start button to restart the service. STEP 3: Click the Start button to start the service. STEP 2: Look for Windows Installer from the list. In the Search programs and files field, enter “ services.msc” then press. OPTION 2: Make Sure that the Windows Installer Service is Running STEP 3: Restart your computer, then try installing Microsoft Security Essentials again. You may need to download and run a cleanup utility in order to completely remove these programs. NOTE: Some Internet security programs do not uninstall completely. STEP 2: In the list of programs installed, look for any third-party Internet security programs and click Uninstall.

In the Search programs and files field, enter “appwiz.cpl” then press. OPTION 1: Remove Any Existing Security Programs NOTE: It is advised to print or bookmark this page since there will be a point where you will be required to restart your computer.

To resolve this issue, follow the steps below: If you encounter problems installing Microsoft Security Essentials in your computer, it can be due to some other security programs running or you may be missing some prerequisites. Microsoft Security Essentials provide real-time protection by helping you guard your home or small business computers against viruses, spyware, and other malicious software.

Security essentials for windows 7