I had 12.04 LTS 32 bit alongside Windows 7 Home Premium 64 bit. Windows uses EFI. When I noticed that I had Ubuntu in 32 bit I decided to install 12.10 64 bit. I wanted to install an upgrade to keep my settings of Thunderbird and Firefox (data is stored on Windows partitions). The installer found EFI but told me that something went wrong with GRUB. I used boot repair and got the following link:
I hope someone can find the error and help me fix it. Thanks in advance.