Moz's questions

I have Ubuntu10.10 x64 and after installing Windows 7 grub dissapear I log on with my usb to reinstall grub and now grub only shows Ubuntu... Then when I try to do update-grub2 I get this:

root@Alienware:~# sudo update-grub2
Generating grub.cfg ...
Found linux image: /boot/vmlinuz-2.6.35-22-generic
Found initrd image: /boot/initrd.img-2.6.35-22-generic
Found memtest86+ image: /boot/memtest86+.bin
ls: no se puede acceder a /var/lib/os-prober/mount/boot
Boot: No existe el fichero o el directorio
done
root@Alienware:~#

It is in spanish but it says it cant get access to /var/lib/os-prober/mount/boot and that Boot: dosent exist.. I dont know what I am doing wrong can someone help me please?

I want to enable compiz on my Alienware m11x r2 but when I try to I get a message that I have to enable Nvidia propietary drivers and I can't enable them because it will cause problems with next startup because the nvidia is the discrete GPU of my laptop, I had done a search this here and here.

But I seem to not get it working right. I have also tried the vga-swticheroo thing with no results at all.

I need to install the internet card drivers on my netbook the problem is that it doesn't have CD tray so I can't install them via the Cd or at least I don't know where to mount the ISO so Ubuntu recognizes it so I can put the Proprietary Drivers. So is there any other way? Or where can I mount the ISO?