Microsoft Silverlight

i don't download it, i don't even download the "crucial updates" of windows as they take a lot of space on the SSD

Silverlight is dead. MS abandoned it themselves, no idea why they still offer it with winupdate (and they ll even unhide it every time again). It was supposed to be something like a Flash replacement, but failed and isn't used anywhere.

I usually install every single update that shows up on Windows Update.

It basically a pdf reader kind of idea. adobe is better

I've never needed Silverlight, myself, so I've never installed it, and hid the update so it wouldn't prompt me again. :P

I don't actually believe there are many websites that actually use silverlight. It was pretty much a huge failure. In the years since it was first launched, I don't think I have ever come across a site that uses it.

not really..

It has been a loong time since I saw the last video/web that required Silverlight to play. You can skip it without any worry

there is a small number of softwares out there that need it.
had one once (don't remember which), so i installed.

if you don't need it, don't use stuff for no reason.