I am compiling a document and it generates the error that the document "siunitx.sty" can not find. What I did was download the library from the page: https://ctan.org/
I got the package, download it paste it at the address: Local disk C, miktex 2.9, tex, latex, and there stick it. There were three files. I sent it to refresh in miktex settings and it still does not compile me.
I went to miktex manager and looked for the library "siunitx" and I got a result I gave it install, accept ... but then I found a box with: = "get host by name failed in tcp_connect ()"
And now, I do not know what else to do.