Backup wants to include empty logical partition & can't be deselected

Hi, just installed a fresh copy of Win 7 pro 64 on a drive reclaimed from a laptop which had Win 7 Home Premium 32 previously.

The drive is partitioned C through G. Apart from reformatting C: during the install of Win 7 pro 64 nothing else was deleted/changed on the drive as it holds a lot of data.

After doing all the updates and installing a few programs (which aren't installed on c:\) - I tried to do a backup image - I had to uninstall a couple of programs as these were forcing the inclusion of the programs partition in the backup and was I subsequently able to deselect it.

However Backup was including a partition which I only use for temporary files. I changed the user/system environment variables so Temp/TMP is back on C:\ but after rebooting backup is exclusively including it as a System drive.

I looked in disk manager and this partition was labeled as "Primary" when I know it was created as a Logical drive initially. I deleted the partition in Disk manager and was then able to run a backup just on the Reserved and C: drives as desired.

I then used a 3rd party tool to recreate the partition as a logical drive thinking that was the problem, but Backup still wants to exclusively include it.

The only thing is the problem partition used to be "D" when it was in the laptop and is now showing as "G" - I was having problems with the laptop the drive came out of and had booted into a USB drive at some point and I think that changed the drive letters and maybe it's a hangover from that?

Somewhat bizzarely I have been able to fix the behaviour through the simple act of changing the drive letter to anything but "G".

This was after deleting/merging/moving reformatting etc etc, of course it was the simplest solution.

Apologies for not responding sooner. I decided it wasn't worth the effort figuring out the solution so have deleted the partition and merged it's space.

Backup only includes the desired drives, so I'm happy with that.

Thanks