Re: Acer Aspire One upgrade question
Don't expect a netbook to be your laptop alternative. It'll never happen. Most likely, the answer is, too many programs running in the background, and/or spyware/malware. Most netbooks have a limit of 2GB RAM, and at most a dual core Atom. They can't handle as much as your everyday desktop or laptop can.
Run CCleaner and Malwarebytes. Go to run and type msconfig, startup tab. Anything you don't need or have no idea what it is, uncheck it.
If it is running XP Home, it can run XP Pro. It's the same beast, just with more administration privileges.