generally you just untick stuff in your Startup tab.
Other stuff you have there may relate to your Virus Scan and firewall. If you use IM programs then you may have references for them there as well. These aren't necessary. You can start these up in windows as and when you need them.
To be 100% sure, do a post with what is in your startup tab and see if someone a little more knowledgeable than me can sort the wheat from the chaff!