need help fixing grub

[Ashley MLP Fangirl]

i installed Windows 10 next to an ubuntu install and now i can't boot grub anymore. it goes straight into Windows. 

[Electronics Wizardy]

What do the partitions look like? Windows 10 probably overwrote grub. Go boot into a live disk and reinstall drub.

[Ashley MLP Fangirl]

2 minutes ago, Electronics Wizardy said:

What do the partitions look like? Windows 10 probably overwrote grub. Go boot into a live disk and reinstall drub.

i already tried that, got an error: can't get canonical path of /cow

[Electronics Wizardy]

Just now, firelighter487 said:

i already tried that, got an error: can't get canonical path of /cow

what command did you use? was everything mounted right?

[Ashley MLP Fangirl]

1 minute ago, Electronics Wizardy said:

what command did you use? was everything mounted right?

wait now the error has changed. i'm using grub-install /dev/sda and now i'm getting an input/output error

[Electronics Wizardy]

36 minutes ago, firelighter487 said:

wait now the error has changed. i'm using grub-install /dev/sda and now i'm getting an input/output error

is your system uefi or bios? What is the partition layout?

[jpenguin]

Use a supergrub disc to get into Ubuntu,

[Ashley MLP Fangirl]

15 hours ago, Electronics Wizardy said:

is your system uefi or bios? What is the partition layout?

well it doesn't really matter. i just reinstalled ubuntu and now it's fine.