GParted, a complimentary partition editor, empowers users to resize, divide, format, and modify partitions on Windows, Linux, and other operating systems.
Procedures

Get the gparted-livecd-0.3.4-11 by visiting http://sourceforge.net/project/downloading.php?group_id=115843&filename=gparted-livecd-0.3.4-11.iso&7005223

Employ your preferred ISO burning software (Roxio, Nero, etc.) to write this file onto a CD.

Insert the CD into your CD drive. Reboot your computer; it should boot into the gparted-livecd. Proceed to step 4. If not, restart your computer and check the BIOS screen for boot options. Press the appropriate key and set it to boot from CD. You might need to access BIOS settings on certain computers.

Upon reaching the boot screen, select the first option.

Several boot lines will quickly appear. Press <enter> if prompted for language selection (choose English if desired).

After the system boots up, a GParted window will appear.

(This step is for resizing your Windows partition.) Right-click your Windows partition from the list, then click 'Resize/Move' and proceed with

(A) Adjust the bar in the image representing your Windows partition to reduce its size, or (B) input your desired partition size in the 'Partition Size' box.

Finalize the alterations by selecting the 'Apply' button
Pointers
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You have the option to revert changes using the 'Undo' feature
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Additional functionalities include reformatting, deleting, or relocating partitions.
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Like all software, GParted may encounter bugs. It might experience issues modifying file systems, recognizing file systems, and detecting file systems as corrupted.
Cautions
- Avoid dragging and dropping the ISO file onto the CD. Utilize an ISO burning program instead. Most computers come with bundled software for this purpose, but you might need to install a free ISO burning application. There are plenty available online.
- Partition modification carries risks. It's advisable to back up your files unless you are certain it's safe to proceed.
Necessities
- Standard CD
- Computer