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Windows 7: Running Low On Drive C Space

06 Feb 2015   #1

Windows 7 Home Premium 64-bit SP1
Running Low On Drive C Space

Within the last month I began seeing this message. I ran Disk Cleanup, and even uninstalled some little used programs, but I kept running low. For years I've kept a compact system volume of about 28GB in the logical 30GB C partition. All User info is on other drives. I've never run short of space before, but just to give me some room, I used Mini Partition Tool to add an additional 5GB to the C partition. This "filled up" within a week without me adding any programs, and now I'm getting the message again. I've tried Disk Cleanup, CCleaner, etc, with no improvement. This is my current status:

I'm at a loss with this because WinDirStat shows what has always been the historic size of my Boot Disk, but the others do not. Can someone help me solve this dilemma? Thanks

My System SpecsSystem Spec
06 Feb 2015   #2

Windows 7 Home Premium 64-bit SP1

I noticed that TreeSize showed a 10GB folder called System Volume Information, which was not identified by WinDirStat. On Googling it, I found that it contained restore points. A thread in Tom's Hardware showed how to reduce its size in Advanced System settings. I reduced it to 2GB and now have plenty of C drive space. I manually back up the Boot drive weekly using Macrium Reflect, so I shouldn't need many restore points. TreeSize proved to be more useful than WinDirStat in this case. I'll leave this thread open for a few days to allow other responses, and to see what happens.
My System SpecsSystem Spec
07 Feb 2015   #3

Windows 7 Ultimate 64-bit, Windows 8.1 64-bit, Mac OS X 10.10, Linux Mint 17, Windows 10 Pro TP

One does want to keep System Restore working even with a smaller size than the default as a number of install and uninstall routines and cleanup programs tend to create a new Restore Point before doing their work. Then of course there may be another created at the next bootup.
My System SpecsSystem Spec


 Running Low On Drive C Space

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