Yes that is the 10% free space warning in Windows 7. This is to protect users from accidently deleting files. As stated you will need to use some space on those other drives/partitions.C drive is not the Problem!
Another drive is 450 GB in size
45 GB Remained is the red!
C drive is not the Problem!
Another drive is 450 GB in size
45 GB Remained is the red!
ScreenShot Not For My Computer. Just to explainC drive is not the Problem!
Another drive is 450 GB in size
45 GB Remained is the red!
I was going by the screen shot you posted that showed C in the red and lots of free space left on D.
ThanksThere's just no way to change that.![]()

You can actually remove the colorbar completely quite easy.
1. Run REGEDIT as administrator
2. Open HKLM\Software\Classes\Drive
3. Change the value for the key TileInfo. Remove the phrase "System.PercentFull;"
The key should read the following:
Before: prop:*System.PercentFull;System.Computer.DecoratedFreeSpace;System.Volume.FileSystem
After: prop:*System.Computer.DecoratedFreeSpace;System.Volume.FileSystem
4. Restart windows explorer (open task manager, and kill the process explorer.exe, choose File, Run and type in explorer.exe)
5. Now open Computer to see the absense of the colorbars
Note: This method does not disable the warning which occurs when free space falls below 10%. It does only remove the anoying red bars.
This is like asking how to disable warning lights in your car. Spend your efforts cleaning up your computer to make extra space. The performance of your computer is already slowed due to your lack of free space, and it's only going to get worse. Fix the problem, rather than worrying about hiding the warnings.
It's actually not subjective at all. It's been a known fact for well over a decade, and it's not Microsoft's doing. It's the way a computer handles a disk drive and how it writes files to the drive through the file system. It does have an impact on performance, and can have an impact on stability as well. It does matter, especially when we're trying to put the OP in the best position.I don't have any performance slowdown 'due to my lack of free space'.
From my point of view this is completely subjective. Although Microsoft states you have to have an amount % free of disk space for defragmentation and whatnot.
That really doesn't matter in my opinion if you have a fast and stable system.
This is like asking how to disable warning lights in your car. Spend your efforts cleaning up your computer to make extra space. The performance of your computer is already slowed due to your lack of free space, and it's only going to get worse. Fix the problem, rather than worrying about hiding the warnings.