Windows 10: How to install missing security fixes?

A few days ago, I started using my laptop again after about 2 weeks. Up until then, my laptop was working fine. Now, my computer has been running very very slowly.My first thought was to do a system restore to when I last used it, but all restore points were erased. Don’t ask me how. When that idea failed, I tried to install all the updates that my computer needed. That idea isn’t working properly because, when I go to >Settings and then >Windows Update, there are at least 2 updates which will not install properly and it says in yellow “Your device is missing important security and quali

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windows xp installation and dual core am

could someone please list the steps they follow to install windows with a dual core processor and windows xp service pack to. I'm reletively new to amd dual core and i feel i'm missing a step. All help will be appreciated. thanx

 

Windows Security is missing

Please complete the steps listed under the section "Step 2: Repair/Restore the Windows Defender Service" in the Defender service missing article, and reboot Windows. Note: Import the REG file as TrustedInstaller, as described in the article.

If that doesn't help, a repair installation (see the link in my previous post) is needed.

 

Windows 10 Updates: Your device is missing important security and quality fixes

Hi there,

Windows updates are available, however the system does not update these nor lets me do it manually. This message shows: Your device is missing important security and quality fixes, and a list of 6 pending download updates are listed below.

I followed the steps I could find in this community from other users having similar difficulties in the past and it didn't fix it.

Please help.

Thank you,

Laura C.