During fresh installation procedure I get this error:
Error installing /cdrom//pool/main/g/glibc/locales_2.19-18+deb8u2_all.deb
trying to overwrite '/usr/sbin/validlocale', which is also in package libc-bin 2.21-0ubuntu4
After closing this error, another one pops up saying the installer has crashed
I booted my laptop from a live USB which has iso of Ubuntu 15.10.
I used unetbootin to make the bootable USB.
locales_2.19-18+deb8u2_all.deb
belongs to Debian jessie. It isn't compatible with Ubuntu 15.10. Are you sure you are using an official Ubuntu ISO image?