I tried installing Kubuntu alongside Windows on my Medion Erazer Deputy P60. Kubuntu worked normally in the live environment, so I created a roughly 50 GB partition in Windows and selected it during installation. The installation completed without reporting an error, but after restarting, neither operating system boots correctly.
GRUB appears, but selecting Kubuntu leads to a lit black or terminal-like screen with a white horizontal cursor. Selecting Windows shows the normal Erazer logo and sometimes "Preparing Automatic Repair," but it never progresses. I also tried booting antiX and a Windows 11 ISO from USB using Android tools, but those attempts either show a black screen or freeze at the laptop logo.
The SSD is still detected in UEFI, and using "Boot from file" lets me browse the C: drive, so the data may still be intact. I do not have another computer available and would prefer an Android-based solution if possible. My priority is getting the laptop working again, but I would also like to recover my files if there is a way. The laptop has an RTX 4060, 16 GB RAM, and an Intel i7-12650H.
3 Answers
Follow a standard Linux dual-boot installation procedure carefully rather than installing into a partition prepared manually in Windows. The installer needs the correct existing EFI partition, boot mode, and partition layout. For now, booting from external recovery media is safer than repeatedly changing the internal disk. A Windows repair installation may restore the Windows bootloader without deleting personal data, but back up anything important first because recovery and reinstall operations can still go wrong.
The most likely problem is that the EFI system partition or Windows boot files were overwritten or left in an inconsistent state during the Linux installation. The fact that the SSD and C: drive are visible in UEFI is encouraging and does not suggest that the drive is necessarily dead.
Before reinstalling anything, try to boot a properly created Windows recovery or installation USB and use its startup-repair tools. If repair cannot restore Windows, copy your important files to an external drive from a live environment first, then reinstall Windows and rebuild the Linux installation afterward. Avoid formatting or deleting partitions until the files are backed up.
You do not necessarily have to give up on your files. A Linux live USB or Windows recovery environment can often mount the existing Windows partition and let you copy documents to an external USB drive. Since you only have Android available, creating a bootable USB from a phone may work, but some phones and USB-writing apps do not produce a UEFI-bootable drive reliably. If possible, use a known-good USB drive and verify that the laptop is booting from it rather than immediately falling back to the internal disk.
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