You can boot into a LveCD and run the GParted (System > Administration > Partition Editor) and shrink either your windows or Linux partition to expand your swap partition.
Or, you can create a swap file and avoid messing with your partition layout and the risks that go with it. To make a swap file, use the following steps.
Create the swap file
Format swap file for use
sudo dd if=/dev/zero of=/mnt/1024Mb.swap bs=1M count=1024
Activate the swap
sudo mkswap /mnt/1024mb.swap
Add the swap file to /etc/fstab. First open an editor
sudo swapon /mnt/1024mb.swap
Then add the following line to the end
gksudo gedit /etc/fstab
/mnt/1024Mb.swap none swap sw 0 0