No boot loader is installed in the MBR of /dev/sda

I just did a boot-repair because I can't run windows 8.1 from the grub (I see many options but none works) and I got this result: http://paste.ubuntu.com/9558801/

My question is : Should I care about the following message :

No boot loader is installed in the MBR of /dev/sda.

Is it the origin of the problem?

Solution 1:

Looks like you are using UEFI booting and GPT partitioons (the newer way). So you can ignore the message about the missing MBR.

I suggest running gparted and checking if your /dev/sda2 partition has the boot flag. For some reason, that seems like a common problem. I've answered a similar question previously.

Solution 2:

Problem solved!

I just had to disable Secure boot in the bios and now I can boot both in Linux (Lubuntu) and Windows.

I still have 5 entries for Windows, some work, others don't and I don't know why... As long as it works :D.