How to Increase the Size of C Drive (Primary Drive) without formatting

One day when I reached one of my offices I found a message in computer screen “low disk space”. The free space in c drive is very low. But there is enough space in other drives.

1,My First step to free up the c drive is Emptying recycle bin

Deleting the files in temp folder and using CC Cleaner But with these operations only a small space is free.

Then I found a technique in Internet to free up space in C Drive

Right-click the recycle bin.
Select Properties
Move the size slider down to about 2%
Click OK.

2,Other technique is using Gparted software.GParted is a free partition editor for graphically managing your disk partitions.With GParted you can resize, copy, and move partitions without data loss, enabling you to:

Grow or shrink your C: drive

Create space for new operating systems

Attempt data rescue from lost partitions

You can download GParted. Do a quick Google search and burn it to a CD or flash drive. From there, resizing and reconfiguring your partitions is straightforward.
Warning: When you start reconfiguring the partitions (When you click "Apply Changes" in the program), do not let the computer lose power. Otherwise, you WILL lose your data.

The Download Link is http://gparted.sourceforge.net/

3, Another Partition Manager Software is Norton Partition Magic. From this we can increase the size of the C drive. 

The Download link is http://norton-partition-magic.en.softonic.com/