Thanks for responding!
I am unable (most likely too incompetent) saving the error message. I inserted an USB stick but no response on the monitor whatsoever (pity the 'Help' item on the live cd isn't functioning).
Anyway, I copied the messages by hand...:
"An error occurred while applying the operation"
Details:-
Move /dev/sda2 to the left and grow it from 27.77 GiB to 50.12 GiB 00:00:00 (red disk/white crossbar - failed)
Calibrate /dev/sda2
path: /dev/sda2
start: 9.8,64,382
end: 156,301.311
size: 58.236,930 (27.77 GiB)
Move /dev/sda2 to the left and grow it from 27.77 GiB to 50.12 GiB 00:00:00 (green checkmark - okay)
Calibrate /dev/sda2
path: /dev/sda2
start: 98,064,382
end: 156,301.311
size: 58.236,930 (27.77 GiB)
Move /dev/sda2 to the left and grow it from 27.77 GiB to 50.12 GiB 00:00:00 (red disk/white crossbar - failed)
old start: 98.064.382
old end: 156,301,311
old size: 58,236,930 (27.77 GiB)
requested start: 51.200.000
requested end: 156.299.263
requested size: 105.099.264 (50.12 GiB)
libparted messages:
Unable to satisfy all constraints on the partitions.
Can't have overlapping partitions.
==========
Copied/pasted from terminal:
kayman@kayman-System-Product-Name:~$ sudo fdisk -lu
[sudo] password for kayman:
Disk /dev/sda: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders, total 156301488 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0971aa98
Device Boot Start End Blocks Id System
/dev/sda1 * 63 51199999 25599968+ 7 HPFS/NTFS/exFAT
/dev/sda2 98064382 156301311 29118465 5 Extended
/dev/sda5 152111104 156301311 2095104 82 Linux swap / Solaris
/dev/sda6 98064384 152109055 27022336 83 Linux
Partition table entries are not in disk order
=======
I sincerely hope that these messages will assist you to determine corrective course of action.
Many thanks in advance!