Hi All, was wondering if you could help, apologies if this has already been answered.

So my laptop has a 500GB HDD. The only OS installed was Ubuntu.

I decided to boot from Hirens USB and used a partition tool to create another partition (it was my intention to install Windows on this second partition)

Now, when I am booting the laptop it is stuck at "GNU GRUB" screen, with the grub> prompt.

I understand the MBR may have been corrupted or needs to be reconfigured

any help is appreciated....really dont want to format the drive again as there is some data I need access too.

Thanks in advance

Not enough info.

How does ubuntu boot? UEFI or BIOS?
What type is the partitioning? Gpt or msdos?
What did you actually do with the partitioning tool (description)?

Can you boot to a live usb of ubuntu and post the output of "sudo fdisk -l"

What version of Ubuntu are you running? Is the grub screen output show version 0.97 or 1.99?

The grub>: prompt typically means grub has found everything except its configuration file usually grub.cfg which is usually in the /boot/grub directory. As posted without knowing how the drive is partitioned and what changes you made it is difficult to provide help.

Worst case, you deleted your root partition and now have to figure out how to recover your data.