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Windows 10 Anniversary Update Borks Dual-Boot Partitions (omgubuntu.co.uk)

Windows 10 Anniversary Update may affect and even delete other partitions on the same disk, OMGUbuntu is reporting, citing several complaints by users. "Broken boot loaders on an update are one thing but losing data, even entire partitions?" asks the author. Microsoft-centric news blog WindowsReport is corroborating on the report, adding that in some cases, the new OS was not able to detect some partitions. It says (edited): Many users are reporting that some of their partitions disappeared after installing the Anniversary Update. Usually, it's the smallest partition that disappears, although we couldn't say for sure whether the partition is deleted or if Windows simply doesn't detect it. Some users are saying that the partition is not allocated, while others can detect it once they install third-party partition management applications.We have reached out to Microsoft for clarification, and will update the post when we hear back from them.

8 of 281 comments (clear)

  1. happened to me today by Anonymous Coward · · Score: 5, Informative

    lost my primary Linux partition which was my main OS. could not recover partition intact, only 120,000 files recovered with photorec. will use VMs in future if I need windows for anything

    1. Re: happened to me today by Anonymous Coward · · Score: 5, Informative

      So you don't do regular scheduled backups? Let this be a lesson for you.

    2. Re:happened to me today by psm321 · · Score: 4, Informative

      Try testdisk (generally comes in the same package as photorec). It can find filesystems and fix the partition table

    3. Re: happened to me today by ITRambo · · Score: 4, Informative

      I disagree with your claiming that it's more the users fault than Microsoft's. MS is doing whatever they feel like doing to users computers, these days. Time to find alternatives. I personally researched many Linux distros (tested Live) and found that Mint 18 does everything that I need it to do. LibreOffice, included, opens all my Excel, Word and Publisher files perfectly. It can't save in Publisher's file format, but it can open it. Windows 10 is no longer needed by most computer users, especially those that just surf the web and check their email.

  2. Metered Connection is your Friend by Sydin · · Score: 4, Informative

    While I imagine I'll have to bite the bullet on my sole Win 10 machine eventually and download the anniversary edition, I intentionally set it to "Metered Connection" for exactly this reason. I like to let major updates hit and assess the impact for a few days before taking the plunge, and currently telling Windows you're on a metered connection is the only way to get it to not automatically download updates. Looks like I'll be waiting a bit longer than I thought - would not appreciate my Linux partition going up in smoke.

  3. Re:pretty sure this has always been the case... by RKThoadan · · Score: 4, Informative

    This is more than that... if the reports are true. They are reporting that it's messing with and deleting other partitions on the hard disk. It sounds like it's at lease messing with the partition table.

  4. Also changes privacy settings by gearloos · · Score: 5, Informative

    Also - It installs Cortana and fully enables it, no surprise there, but if you go into all of the privacy settings it has changed the settings for items like writing monitor to "help Microsoft track how you type". Yeah they need to know that all right... as well as several other items I found had been reverted back to the non private settings. One, the diagnostic phone home, is again on and takes a registry hack to turn it back off again.

    --
    "Computers are a lot like Air Conditioners" "They both work great until you start opening Windows"
  5. Re:pretty sure this has always been the case... by Anonymous Coward · · Score: 5, Informative

    > They are reporting that it's messing with and deleting other partitions on the hard disk. It sounds like it's at lease messing with the partition table.

    The Win10 upgrader (from Win7) did exactly this to my Linux partitions.

    The upgrader needed a few hundred MB of space to create some sort of rescue partition. Rather than resize the 1TB NTFS primary partition at the front of the disk (of which 900GB were free) it decided that (because it didn't recognize the filesystem type in the partition) it was okay to _delete_ the first logical partition, resize the extended partition by a few hundred MB, and move the extended partition down. It then made another primary partition in front of the newly moved extended partition and formatted that primary partition with NTFS.

    I've _never_ had a Windows installer do so much damage. Overwriting the bootloader? Sure! That's shitty, but entirely reasonable. Deleting partitions that aren't FAT* or NTFS because you don't recognize what they are and -thus- assume that they're unused? That's _incredibly_ shitty.

    This is the kinder, more open-source friendly Microsoft, guys.

    I hope to hell that this Win10 update doesn't put me through this shit again. That wasn't a fun day.