Hey folks,first,happy new year to you all!!
OK,just got an acer aspire one,what a nightmare! It came with mcafee security,so I got rid of that and installed avast,then the problems came,the thing will not work at all,I've got all my icons on desktop but nothing works,I deleated avast but its totally crashed... please help.

As it is new, reinstall back to factory and then uninstall mcafee again and try another antivirus

Thanks for the response seahawk.
How do I go about doing a re-install? Can it be done by sd card?

Well with my acer, when you start the PC and the Acer logo appears, hit
Alt + F10 at the same time and you should be taken to the recovery console which will allow you to go back to factory settings - this should be the same for yours also

Have to make sure that you do the alt+f10 when the acer logo is showing, so be ready when you turn on the computer

If this does not get you in, post exactly what model you have there and will see what key combo it is - This is of course you did not receive any discs with the computer

OK,tried that,nothing,its an acer aspire one,model number ZG5,I've now lost internet,and the card reader.

Using Acer eRecovery Management
You can launch Acer eRecovery Management in a number of ways:

• By pressing the hotkey <Alt> + <F10> during the boot-up process, or at any time when you are running Microsoft® Windows®.

• From the Start menu, go to Start > (All) Programs > Empowering Technology > Acer eRecovery Management.

Then Choose "Restore system to factory default"