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I installed my Windows 7 in 3-4 months ago and it ran very well until yesterday. My C drive is about 40Gb. The combined total of all the visible folders in the root directory of my C drive is 16Gb (including the Windows folder), but my system tells me that I have only 1.13Gb of free space. I haven't installed any Programs and Updates. What can I do?

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    Windows 7 is a pig, just the windows folder can take almost 20gb of space, 40GB of Hard dirve is just enough for windows 7 OS but not enough to have software/apps/games/etc. as Bigbio2002 suggested you should run: Treesize Free and check which folder is causing it: jam-software.com/treesize_free/TreeSizeFree.zip
    – Miro co
    Commented Jul 18, 2012 at 4:55

4 Answers 4

Reset to default
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Run chkdsk /f. If the problem still occurs, you might want to use a utility like TreeSize to see if there are any hidden files taking up space. Although it's also possible that your HDD could be dying...

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    I install TreeSize Program and find the big size temp. My temp was about 22 Gb. Thank You.
    – Mohammadhassan Esfahanian
    Commented Jul 18, 2012 at 6:22
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IT is because of your PageFile . page file is not visible until you disable the "Hide protected operating system files" on folder option. after that you can see what is the exact cause of Low Disk Space. it is good to run a Clean Disk but it is not a solution. in such these cases you should handle PageFile your self by going to Control Panel > System > Advance > Performance Options > Advance > here change the size of virtual memory. do not allow windows manage it.

and choosing a size for your page file that can suit your HDD capacity.

I hope this will work. let us know about the result.

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  • It could be also hibernation file. On modern computer with 16GB for example it will be... 16GB!
    – Kamil
    Commented Nov 14, 2014 at 6:55
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See if you have shadow copies enabled. Restore points could be eating up the HD space.

Open My Computer and right-click the C: drive. Select Properties.

Go to the Previous Versions tab. Do you see a lot of restore points? If so, they can be removed, or disabled altogether.

Open the Control Panel.
Control Panel > System and Security > System

Click System Protection in the left pane.
Highlight Local Disk (C:)(System) and click Configure...

From here you can press Delete to remove all the restore points and then reduce the Max Usage slider lower to something more reasonable.

There is also the option to Turn off system protection if you really low on disk space.

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  • Sir, I created an account in this site just to up vote your answer and thank you personally. I have struggled with this issue for so many years ending up re-installing windows every time when the solution has been so simple!!!
    – php_nub_qq
    Commented Feb 17, 2015 at 21:26
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There could be a number of reasons so try all suggestions :-) I'm sure all the space can't be missing due to temporary files but here's a program that may help a little. It deletes old, unsued and temporary files/logs. http://www.piriform.com/CCLEANER

I don't think anyones mentioned this and it is simple so I may be stating the obvious. Make sure you are viewing hidden files/folders. To do this go to this open C: and go to "folder options" (you may need to press alt to see it) select "view" tab and select "show hidden files, folders and drives" and hit apply.

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  • CCleaner just search in recycle bin, Temporary internet files and also in registry I am not sure in this case it help
    – nfarshchi
    Commented Jul 18, 2012 at 5:13
  • @nfarshchi you're probably right but if this is a combination of problems it would help.
    – Celeritas
    Commented Jul 18, 2012 at 5:15

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