Whoooo there boy !! Take a few deep breaths and go roll yourself a fatty

I feel your frustration as I've been in your position lots of times !! I'm going to list everything you need to do on your machine to fix following the ubuntu tutorial. Feel free to give it a go when you feel more like it
Assuming you have completed the installer and have the grub error
1) Boot from linuxcoin
2)
mkdir myhdd
mount /dev/sda1 myhdd
mount -o bind /proc myhdd/proc
mount -o bind /sys myhdd/sys
mount -o bind /dev myhdd/dev
chroot myhdd
export DEBIAN_FRONTEND=noninteractive
apt-get update
apt-get purge grub2
apt-get install grub2
for i in $(ls /usr/sbin | grep grub); do paxctl -C /usr/sbin/$i; paxctl -cEr /usr/sbin/$i; done
update-grub
grub-install /dev/sda
exit
init 6
3) Hopefully enjoy linuxcoin
Lolz@ a fatty. Cheered me up, laughing.
Alright, It WORKS!!!!!!!!!!!!!!!!!!

Now though, hate to say it, two problems.
Cannot save a leafpad to desktop.
Plugging in any SDHC or USB stick, I receive
error mounting: mount: unknown filesystem type "vfat"
How could I fix these two problems.
Thank you drgr33n for your precious time.