By keeping the OS on its own partition (often C:), you can format or reinstall Windows without losing your personal documents or games on other partitions.
Some popular third-party tools for partitioning Windows XP are: partition windows xp
Here is how to use Disk Management:
You cannot shrink C: with native XP tools. You must: By keeping the OS on its own partition
Select the new partition and choose to format it using the NTFS file system. Note: Use the "Quick" format option to save time. partition windows xp
Smaller partitions lead to quicker disk checks ( chkdsk ) and more efficient defragmentation.