I know this has probably been answered many times before, so please send me links if you know.

I had Ubuntu 16.04 (three years ago), added Windows 7 (two years ago). Setting it up was very hard, but I did it successfully (Ubuntu on hda1, Win 7 on hda2).

Last month, I had a failure loading Ubuntu, but Windows could launch using a Boot CD and Boot Manager (pointed to hda2). Last night I reinstalled Ubuntu (18.04) from a Live DVD in the original partition. BUT Now Windows cannot load, either from GRUB (it is listed there) or from one of those Boot Managers that point to hda2. Instead, I get a complicated series of error messages from grub (recalculating checksums, advice to run "bootsect /nt60 SYS /force", others).

Can this be easily fixed?

  • Need to see output of grep -A10 -i Windows /boot/grub/grub.cfg and sudo parted -l. – Paul Benson Nov 19 '18 at 19:55
  • Problem solved! Elsewhere, I followed the following tip. 1. In grub, highlight Windows 7, then press the key <e> 2. Add the following line after the line <insmod ntfs> insmod ntldr 3. Replace the line chainloader +1 with he line ntldr ($root)/bootmgr The original thread is here: askubuntu.com/questions/135272/… – Cliff Sloane Nov 19 '18 at 22:51

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