I had some issues when I upgraded to Win 7. Specifically it stuck the OS in a partition, recommended the size (10G) and then called it C. So as you can figure it is full and I cannot resize larger nor change the letter. Does this mean reinstall. DOS format remove all partitions and start over. Or is there a Utility to fix my ignorance?
Not quite sure why you can't resize, but there are many utilities that will do this for you (ChrisCornell mentions one - you might also look at GParted). From experience I can tell you that such resizing sometimes leads to an unbootable system, but that is easily cured by doing a repair from the install DVD.
In any case, you will still end up with at least one partition on your disk.
Use GParted Live (Google it). You boot it from a CD, so it doesn't matter which version of Windows you have. Backup any important data before attempting to mess about with partitions. It shouldn't go wrong, but....
Tryed it. Something to do with Logical Drive I am thinking, if it was simple I would not be here. The problem arrises from the fact the OS has protected the partition, I just am at a loss to determine a way around the process. I tryed GParted, it responds the same as the Disk Manager.