Hi and Welcome to PCLinuxOS forum!
Of course, it possible to add a swap partition after installation. It's even possible to add a swap file
instead of a partition.
You posted several questions, before to provide the required info I have another couple of questions for you:
- do you really need the swap partition ?
I mean, swap is actually used for a couple of things: as virtual RAM when your system run out of real RAM, which is highly improbable if you have 4 Gb or more, and can be used to hibernate the system. I myself, do not use swap at all. (4 Gb RAM).
- about reducing/removing the windows partition: yes it's possible, however to provide specific instructions you should post the content of your partition table, from root account run the following command: fdisk -l
this way we can understand the actual structure/sizes of your partitions, consequently we can provide any additional hints may be needed to successfully perform the requested extension, of course the above info are however helpful to setup the new swap partition.
- about the "strange things", feel free to share your experiences here or in sandbox section, where appropriate.