You are booting from the Windows 7 partition, which is the only primary
partition. Therefore you can't delete it, as Windows cannot be
started from a logical drive.
If you would like to reuse its disk-space, I suggest to boot to
Windows 7 and use Disk Management to reduce the size of the
partition as far as it will let you. Ensure that there is at least
1 GB ...
It looks like the .grubparts file is from the wrong disk. Your "old" partition list shows a normal MBR-format partition table, but what you restored looks like the "protective MBR" that is normally found on GPT-partitioned disks – it has the special partition of type 0xEE that usually indicates "you shouldn't be looking here, you ...
A simple solution would be to use the free and open-source
It supports full-disk encryption, but also encrypted containers.
A container looks like a file that requires a password for mounting,
so can be used cross-platform (select for that a cross-platform
You will find documentation on the VeraCrypt site, but also many ...