Well, you probably want McAffee to run at startup because it's your anti-virus, etc. I highly recommend not disabling any security apps. Otherwise you can go to Start > Run and type in
msconfig. Click the startup tab and uncheck what you don't want.
As to more
RAM, I recommend having a professional do it because laptops are hard to upgrade. But if you do want to do it yourself, you would need to find out what kind of
ram you have. I can't find the link to the program right now and need to leave for work, but if you can't find out what kind (probably something like PC-133) then I will post it when I get home in about 5 hours.
Thanks,
Adam