I've been using Windows 10 and wanted to install Ubuntu (dual boot) through Universal USB Installer.
Once it has completed, I restarted my PC. Then comes GRUB page which I can choose try ubuntu or install ubuntu and so on.
The problems are: I can't access the ubuntu and also I can't access my previous Windows OS, it still loads that GRUB page and whenever I click on any choices, it just goes blank page and automatically restarts.
How can I fix this? Thank you in advance