Share this article
Improve this guide
Fix: Windows 10 Anniversary Update destroys boot loader in dual-boot config
3 min. read
Updated onOctober 4, 2023
updated onOctober 4, 2023
Share this article
Improve this guide
Read our disclosure page to find out how can you help Windows Report sustain the editorial teamRead more
If you’re running adual-boot system, you should think twice before installing the Windows 10Anniversary Update. Users are reporting that Windows doesn’t boot after Windows 10 version 1607 is installed, as their computers simply display an error message informing them the file system is unknown.
According to user reports, after the download is completed,Windows doesn’t bootin the first re-boot phase. Instead, a message appears, informing users the system is going to enter the GRUB rescue mode:error: unknown filesystem.Entering rescue mode …grub rescue>
At the end of the process, the GRUB rescue utilitylists the partitions, but shows them all as “unknown filesystem”. Many users would rush in to say it’s normal to have this error message sinceLinuxand GRUBBootLoader are not supported in dual boot configurations with Windows. In reality, many users have been running Grub with Linux and Windows for years.
Anniversary Update is destroying boot loader in dual-boot config
My laptop upgraded to the Anniversary update last night. The download took 7 hours! […] After the download completed, and it got to its first re-boot, Windows would no longerboot.[…]
My system was set up with a single drive, a 160GB SSD, withWindows 10Home Edition installed in one partition, and Ubuntu 16.04 LTS in a separate partition. When Ubuntu is installed, it installs the GRUBbootloader, which up till now has had no problem handling Windows and Ubuntu installed on the same drive; it gives me aboot menuthat allows me to select which OS to boot (Ubuntu selected as the default). However, after the Anniversary update, all I got was the above ‘unknown filesystem message’.
Fortunately, all hope is not lost as theboot-repair Ubuntu utility can fix this issue. You can downloadthis free toolfrom Ubuntu’s website.
How to repair boot loader error in Linux and Windows dual-boot configuration
sudo add-apt-repository ppa:yannubuntu/boot-repairsudo apt-get updatesudo apt-get install -y boot-repair && boot-repair
- LaunchBoot-Repair from either the Dash or by typingboot-repairin a terminal.5. Click on theRecommended repairbutton. When the repair process is finished, note the URL (paste.ubuntu.com/XXXXX) on a piece of paper.6.Reboot> check if your dual-boot OS has recovered.
RELATED STORIES YOU NEED TO CHECK OUT:
More about the topics:windows 10
Madalina Dinita
Networking & Security Specialist
Madalina has been a Windows fan ever since she got her hands on her first Windows XP computer.
She is interested in all things technology, especially emerging technologies – AI and DNA computing in particular.
Prior to joining the WindowsReport team, she worked in the corporate world for a number of years.
User forum
4 messages
Sort by:LatestOldestMost Votes
Comment*
Name*
Email*
Commenting as.Not you?
Save information for future comments
Comment
Δ
Madalina Dinita
Networking & Security Specialist
Madalina is a Windows fan since forever, especially interested in AI, emerging technologies, privacy, and security.
