XP Home not accepting/remembering updates.

IObit's Advanced System Care Pro prompted me yesterday that there was an updated version available.

I downloaded and installed it.

A little while later Microsoft's update facility told me that there were updates waiting.

I downloaded them. At the end of the installation a window opened up saying that there had been a problem and the updates were not installed. (Sorry, I don't remember what it said exactly.)

I ran CCleaner and rebooted.

IObit's update alert popped up again and so did Microsoft's, so I jumped through both hoops again.

Neither of them seems to have been installed as I still get both alerts.

Help would be appreciated please.