Cannot extend the C drive? Reasons why you couldn't increase it despite having unallocated space

When using a Windows PC, you may find that the capacity of your C drive has decreased before you know it.I also install ...
Ars Technica

How can I extend my boot partition to take up the rest of my unallocated space?

I just installed a new Hitachi 7K200 drive into my laptop. The drive cloning software that Hitachi provided did a nice job of cloning the partitions from my previous drive, but I've got a problem. The ...