So you probably have the same problem than the one i had.
If you don’t want to reinstall everything or maybe try this for nothing, you can make a backup of the current computer with a software (i used Acronis 2014 CD version) then make a “fresh” install with the 100mb partition then restore you the single partition without the MBR on the 2nd partition of the computer.
I has worked for me.
Yet, i didn’t tried to upload it because the computer was needed for work so only check if windows was starting well.
Thinking again of this, i haven’t check if it’s the 100mb partition or the first partition sector that block the upload.
I haven’t work on partitioning since few months and maybe more than a year.
If i remember well, i was using the sector 63 for all my image, like XP, instead of 2048 like the usual windows 7 installation.
Maybe try to this would be helpfull.

