IIRC, with XP and Windows 7, it took a few weeks before I had everything just the way I wanted it. I turned off most of the "eye-candy" features to speed things up and migrated as much as possible from my previous computer.
With 7, I kept having an annoying problem with it disconnecting from the Internet without my telling it to. I wasn't able to download anything bigger than a few megs and it was driving me INSANE! I finally got it sorted out through a bunch of googling, and then tinkering with various settings. I always hate poking around in the registry, but that's what it finally took. I'm in no hurry whatsoever to "upgrade" again - I put upgrade in 'scare quotes' because I don't believe there's been much, if any, value added to Windows versions since 2000. Good luck!