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Windows Defender and Microsoft Security Essentials: Which one do I need?

Windows Defender and Microsoft Security Essentials: Which one do I need?

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Depending on which operating system your computer is running, you can use either Windows Defender or Microsoft Security Essentials to get rid of malicious software and viruses.

If your computer is running Windows 8, you can use the built-in Windows Defender to help you get rid of viruses, spyware, or other malware. If your computer is running Windows 7, Windows Vista, or Windows XP, Windows Defender only removes spyware. To get rid of viruses and other malware, including spyware, on Windows 7, Windows Vista, and Windows XP, you can download Microsoft Security Essentials for free.

In Windows 8, Windows Defender replaces Microsoft Security Essentials

You can't use Microsoft Security Essentials with Windows 8 or Windows RT, but you don't need to because Windows Defender already provides built-in protection.

What is Windows Defender Offline?

Some malicious software will not allow you to access Windows Defender or other antivirus software. To help detect and remove the malware, you can start your computer by using a Windows Defender Offline CD, DVD, or USB flash drive. 

Get step-by-step instructions for removing a virus.

  • My last 3 Windows Defender updates (I have Windows 7) have failed (see below).  I ran a trouble shooter but it could not ID my error code.  All Defender updates prior to Oct 26 were successful.  All other Windows updates through Nov 14 have been successful.  What is going on here?

    Definition Update for Windows Defender - KB915597 (Definition 1.161.1906.0)

    Installation date: ‎11/‎14/‎2013 10:24 PM

    Installation status: Failed

    Error details: Code 8007007E

    Definition Update for Windows Defender - KB915597 (Definition 1.161.1215.0)

    Installation date: ‎11/‎1/‎2013 9:09 AM

    Installation status: Failed

    Error details: Code 8007007E

    Definition Update for Windows Defender - KB915597 (Definition 1.161.695.0)

    Installation date: ‎10/‎26/‎2013 10:00 PM (Also Oct 27 & 28 attempts failed)

    Installation status: Failed

    Error details: Code 8007007E

  • please i need help, my Pc OS is window 7 home edition it came with an in-built window defender now Can i run and allow windows defender and Microsoft security essential on the same system

  • Yes,you can use both of them just download Microsoft security essentials from Microsoft website's download center...

  • Have you looked into the Error Code in the MS knowledgebase?

  • Please can you clarify - if I have Windows 7 do I just need Microsoft Security Essentials or would I get more comprehensive protection if I also had Windows Defender?

  • My Virus Protection is "OFF"  please i need help to put it on again.  Thanks

  • is a radio station I love listening to for years, it is four weeks now it stopped abprutly, and I just cant get it to work.  What annoys me is, I am able to get all other radio stations in the same radio, on trying to connect, i am getting a message Windows Player cannot play the file because the specified protocol is not supported.  What should I do, please, please, Help me.  Thanks

  • torino72- try uninstalling the program and redownloading it. If that doesn't work go to command prompt -cmd- and type in sfc /scannow to scan for memory problems. Other solutions might include compatibility, anti virus block, lack of admin rights or missing an .dll.  You could also try running event viewer to.

    Godbest- Yes, but it is recommend you run 1 real time anti virus at the time because of resources taken. 1 anti virus + firewall is probably your best choice right now.

  • Yes you need to install Microsoft Security Essential for Windows 7 or XP. But you don't need to install it on Windows 8.

  • protect my system

  • I do not want Systweak Software because filing complaint against them .Any other that is in United States and recommended is OK

  • once I turned defender  on ... to run a  once -off  scan ... I now  cant  turn  it  off ... showing  me  2  anti-virus   programs ...  im  using  Norton 360 ..... can  someone   help ???     thanks ....    cheers    all ....

  • Someone is always changing my email password, how do i stop this?

  • Hello Godbest,

    You are confused!   Not surprising as Microsoft have a distinct lack of originality in naming their products!

    Defender in Windows 7 is anti-spyware (only).  Microsoft security essentials is the anti-virus and ant-spyware and when M.S.E is installed it disables defender.

  • How do I view a CD that is already loaded. It has MRI slides. I only wish to view

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