I'm trying to install the below pasted update.
but a flag requesting administrator permissions pops up, and it does not let me download.
It is the first time this happen. I've tried the troubleshooting tool, with no relief .
Yesterday I downloaded the 4 updates monthly rollup and went well.

"2022-04 Servicing Stack Update for Windows 8.1 for x64-based Systems (KB5012672)
Download size: 10.2 MB
Update type: Important
Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer."

Intel(R) Core(TM) i5-4460 CPU @ 3.20GHz, 3201 Mhz, 4 core, 4 processori logici X64
BIOS LENOVO IEKT26AUS, 22/07/2014 - SMBIOS 2.7
(RAM) 4,00 GB
Windows 8.1 Versione 6.3.9600 build 9600
NVIDIA GeForce GTX 745