Ran Secunia PSI on Toshiba Satellite C655 with Windows 10 Home 32-bit x64-based processor.
All programs up-to-date.
Yellow exclamation at the bottom right click on it says; "Microsoft Update is not installed"
A window pops up "Install Microsoft Update" when I click on it it says open Internet Explorer to update. OK or Cancel. I clicked OK
Start-Internet Explorer- get a popup "This site is not secure". More Information; The websites Security Certificate has a weak signature and is
Red Shield with X - Go to the website (not recommended)'
I go to File Explorer - This PC - search for Microsoft Update - Not found.
I choose "C:" search for Microsoft Update - it's there!