Two strange MSXML updates - KB927978, KB943729

Hello all.

I am running Vista Ultimate for two years. I always worry about updating all the updates automatically when published.
Suddenly to my surprise I discovered today two new updates that were not present until now, and they have older dates.
Both related to XML. Updates are:
KB927978 Date 10:04:07 (!)
KB943729 Date 29.04.09

I wanted to know why suddenly appeared those two updates, do I have to install them, and if it's not a bug - why they appeared to me just now?
Thanks in advance for your help!

well?....

roeelo said:

well?....

Click to expand...

I'll give you a hint. they are windows updates, and if you ggogle them you will know which ones.

ken

I just want to know why they suddenly appeared?
and if it's safe to install them?