I have an Acer Aspire One notebook. I cant seem to

It happens when no boot device is selected, the default is network boot first, you must select CDROM/DVDROM or HD as your first startup device. boot up machine and enter bios setup think its F2 key to enter bios generally it del or f1 or f2 it may say onscreen at start if f2 doesnt work
in the bios set boot order to HD as firstboot option then save and exit
hope this helps
dont know if all acers do this but also if you press f12 on boot up it gives you current boot options select HD that way is current boot and would have to be done everytime