Linux generally uses a different disk format from Windows. You will want FAT or NTFS for Windows. When you format the disk, linux will be gone.
You have no CD drive - is it a netbook (e.g. Aspire One)? You can buy an external USB CD drive but they are expensive. An alternative is to use a USB memory stick to run or install software. This is not straightforward with XP. You will need to read up on the subject.
I also suggest you google Ron's tiny XP.
Also consider replacing Linpus with another linux version which you may find easier to use. That is easy to do from a USB memory stick. In fact, you can try it out without actually installing linux by running it in "live" mode.