JimC wrote:I think you need to backup your data, wipe the drive, and repartition it from scratch (using something other than that MW tool, since i suspect it was writing out an invalid partition table and confusing the other partition managers).
For one thing, the testdisk quick search is showing that the swap partition ends at 37089, with the last partition starting at 37089. They should not be the same (since they'd overlap). Of course, the 2048GB of free space you see with Windows Disk Management is another hint that your partition table has issues. ;-)
My guess is that it's been messed up for a while from something that partition manager you've been using is doing, and you're just now running into issues when using a different partition manager to make changes.
That's my take also. Once the partition table is messed up, all bets are off.
My own experience shows that having a SATA/IDE combination can cause problems with Linux, depending on the BIOS firmware. When GRUB and BIOS disagree over the disk labeling and numbering, it can render the Linux OS unbootable. There are ways to fix this by fooling GRUB, but it's kinda tricky.
If Remix_OS boots, my recommendation is to use its boot loader to chain load into MEPIS. Alternatively, you can use the Windows boot loader to chain load into MEPIS. To do chain loading, you need to install GRUB on the / (root) partition instead of the MBR when installing MEPIS.