[netbook]Slow 10.10

Hello, I recently updated to 10.10 on the netbook and it's loading times are slow and use of the netbook is actually slower than before. BTW acer Aspire one 110

How can I start investigating what is going wrong? I've already removed most of the things I don't want to start at start up.

I have more problems I encountered with 10.10 which I think might have an easier solution:

I used to be able to right click on a file in nautilus and be able to give it a url to be able to share in memenu for identica and similar... now nautilus is hidden, how do I bring the rightclick menu on whatever netbook is using now?