I have installed 2 OS in my disk, first one is windows and the second one is ubuntu, I want to reinstall ubuntu and combine partitions however I'm not sure if I do it, it could cause some trouble.
Reason to combine free partitions is due to I need more free space for applications.
I regularly resize using a application called 'gparted'. It is available in a 'ISO' from the following URL --> https://sourceforge.net/projects/gparted/ . I do not have any dual boot systems and certainly not with one being Windows but I have had great luck with it. It is capable and I have had zero problems with it in Resizing and/or Enlarging Partitions. I have for many years used this app by burning the Bootable ISO image to a CD. Recently I have put the image on a USB Thumb Drive.
I feel that it would work for you, given the Linux is after the Windows, on the drive. This app is a great open source program. As to what it might do to your Windows stuff I proffer no advice whatsoever. It should not create any problems but not sure about the validation thingy ; - )) Robert
