You must do everything on a netbook ( I have the Acer Aspire ONE Netbook) that you would do on a big desktop computer, to minimize CPU and ram loading, shut down unneeded services, and perform all the tweaks to Windows and the registry, to optimize performance.
Even Windows XP needs two gigs of ram to really run right. I don't know how W7 could ever run on 1 gig, without some very serious tweaking.
On W7 I shut down almost 40 totally unneeded services.
Open MSCONFIG>Startup and
uncheck every program that you don't absolutely HAVE to have running on boot up.
As for FREE AV (anti-virus software) have you never heard of AVG 2012 FREE? McAfee has gotten a very bad rep in the past few years. Likewise Norton.
I have the McAfee removal tool on my utilities disk and it gets quite a work out, just like the Norton Removal Tool.
Good Luck,
EDIT: This is an add-on, because I wasn't sure I still had this information.
Shorten the Boot Time in XP, Vista & Windows 7Go to the start button, choose run, then type msconfig and press Ok.
On the system configuration window, choose Boot tab.
Check “No Gui Boot”, then lower the timeout to a more manageable time.
I choose 3 seconds in stead of 30. (windows won’t accept a lower number than 3)
Next choose advanced options.
This is where you can choose how many processors you have.
Most modern PC's are duo core (2 processors) with some quad core (4 processors)
then choose OK. The Windows default is only 1 core.
Now choose apply and OK, reboot and you should see a marked decrease in boot time,
And Run-Time efficiency.