it keeps saying disk is full im trying to restore my disabled iphone

You delete photos, files, applications, music, etc.?

Bottom line is without enough space on your computer, you won't be able to restore your iPhone there. If that's the case, borrow a friends computer or schedule an appointment at your Apple Store Genius Bar for assistance.

Delete some unneeded files off the laptop, or offload some stuff off the laptop and onto other storage, or upgrade the laptop storage to a larger disk or larger SSD?

How much you will want and need to delete and/or to offload or upgrade is probably a couple of times the usage of the iPhone, approximately.

Half a gigabyte is a pretty full disk, when disks and SSDs are routinely a terabyte. Various iOS devices are configured with 512 gigabytes of storage, and more. What your particular iPhone is configured with can be determined from Settings > General. But half a gigabyte of free space is basically a problem, all by itself.

What keeps saying disk is full?

I'm guessing then you are running out of space on your hard drive? How much free memory do you have on your HP?

Well, there's your problem. 432 MB is not enough space on your hard drive to do what needs to be done. You need to clear things off your laptop.