Easiest way to increas C size.

[NoddY]

Why can't you convert the basic disks to dynamic disks? Then you can assign a logical drive to several disks (disk spanning) or concat the existing partitions/volumes.

http://tinyurl.com/benp3

Forget this, volumes that where previously partitions on basic disks cannot be extended. Doh!

[ASB]

Forget this, volumes that where previously partitions on basic disks cannot be extended. Doh!

Theres a more basic problem than that. It's a notebook so dynamic disks are not supported at all.

I think that for the time being I'll simply compress it.

[Mordac]

You might as well just buy a new hard disk. I recently bought a new 80GB drive for my laptop for around £65. Finally ran out of patience with the measly 40GB I had before, it meant I had to carry some stuff around on DVD!
Quick reinstall of XP and apps, restore data from backup and jobs a good 'un.

[pharm]

An alternative way to resize C: on a windows box is to grab a copy of a Debian Linux installer (http://www.debian.org/releases/sarge/debian-installer/) and use its partition manager to resize your partitions. It's quite happy resizing the NTFS filesystem within the partition.

Obviously, stop at that point and don't go any further, unless you actually want to install Debian! Oh, and backups advisable as always if you're messing with your HD

cheers.