Last night we resized two partitions. It told us to restart so we did. While it was restarting it performed the first partition resizing successfully, and started to resize the second, when an error message popped up and asked us to retry, or ignore the error. We tried to apply one or the other but there was no response from the computer (pressing R, I or A did nothing). It appeared that the computer was frozen so we manually restarted but it wouldn't allow us to reboot. It gets around half of the way through and then it simply stops and starts rebooting all over again. If you let it, it will just keep going in circles like this. We tried choosing the "last known good" option but no joy. It also won't allow us to start in "safe mode". I'm fairly sure that this all has to do with incorrect partition sizes or something related. How do we now correct this? Thank you.