If you are running an intel CPU, Microsoft released a new microcode update. Here the direct download links to KB4558130 offline installer.
In case you aren't following the tech news, there are a few vulnerabilities found in Intel CPU that may affect its users adversely. To mitigate and fix the issues, Intel recently completed the software validation of the security patches. Microsoft worked with Intel to release the microcode update to all Windows 10 users running the v2004 version. Installing the Intel microcode update KB4558130 update will patch those security vulnerabilities.
The recent vulnerabilities affected a wide range of Intel CPUs. As such, it is important the update should only be installed in systems with affected CPUs. If you are using the Windows 10 automatic update then you don't have to worry about the compatibility. However, when downloading the KB4558130 offline installer, I recommend you check out this long list to see if your Intel CPU is in the affected list.
If your CPU or CPU family is listed in the list, you can safely install the KB4558130 update via the offline installer. In general, most Intel CPUs are supported but I recommend you check out the list for compatibility so as to avoid any necessary headache.
Do keep in mind that the KB4558130 update is only applicable to Windows 10 v2004. If you are running v1903 or v1909, install the KB4497165 update.
KB4558130 Update Offline Installer Download Links
To make things easier for you, I found the direct download links for KB4558130 for both Windows 10 32-bit and 64-bit systems. Depending on your system type, download the update using the below links and install it like any other Windows software. After installing, restart the system and you are good to go.
KB4558130 x86 (32-bit) offline installer (download size: 2.4 MB)
KB4558130 x64 (64-bit) offline installer (download size: 2.4 MB)
If the above links didn't work for any reason, go to the Microsoft update catalog website to find the appropriate links. All you have to do is click on the Download button next to the appropriate version.
That is all.