Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Hi I am running Windows 7 Home basic on a mini computer operating some test equipment. The hard drive is only small 7.58 GB.I installed Adobe 10 as I was receiving a pop up informing me that the version installed [5] was not compatible. Long story short I uninstalled version 10 and wanted to reinstall 5 as the pdf report print from the equipment software wouldn't work. I also updated the free Antiver Anti virus programme installed. Suddenly it informed me that there was insufficient space to install version 5. On checking the available free space I noticed there was 29MB free and while I was watching the free space disappeared before my eyes down to zero?? I have run defrag no luck. There is no space to install any sort of priogramme to investigate the problem.What is causing this? Any suggestions would be appreciated thanks

share|improve this question
May you use this to see whats going on ? – Mahdi Rafatjah Jun 24 at 15:12

The tool I find best for checking where hard drive space is being used in WinDirStat. It'll provide a graph to show where space is being used.

You should also make sure the Hibernation is completely disabled. You can do this by opening a command prompt with Administrator rights and typing in:

powercfg -H OFF

You can also reduce the size of the page file. Go to Control Panel -> System -> Advanced and change the page file settings to something like 256MB minimum and 1024MB maximum.

share|improve this answer

8GB would be enough if you were running Windows NT but you are not... Windows 7 is a hard drive hog it could have been one of many things increasing in size... an update downloading(Windows,Antivirus,Something Else), Prefetch Growing...

Looking at my Windows Folder it alone is over 14GB so I don't see how you manage with just 8GB and applications.

share|improve this answer
The problem with looking at the size of the Windows folder is that Explorer double-counts loads of hardlinked files from the WinSxS folder. As a result, you get a number considerably higher than the actual disk usage. – Jason Sherman Mar 31 '11 at 6:41
When I look at all my files together and actual disk usages the difference is only like a 1GB so its not that much of a difference. – Arctor Mar 31 '11 at 11:36

The Windows 7 requirements say you need 16 GB for 32-bit, 20 GB for 64-bit. You're pushing your luck to start with...

But it's probably possible to get it running if you strip the system down enough. It'll be a neat trick to keep it under control, though.

Likely, if it's a freshly installed system, Windows Update is pulling down SP1 or something, which will probably need every bit of space you have to spare, just to get downloaded, never mind installed.

Defrag is useless; I don't know why people run it at the drop of a hat. It's not even supposed to help with this kind of problem.

Places to go hunting for disk space...

  • Clobber temp files and internet cache.
  • Disable the hibernation file: powercfg.exe /hibernate off
  • Uninstall unneeded programs or Windows components (Control Panel, Programs and Features).
  • If you have enough RAM in the system to operate without one, disable the pagefile.

You could probably strip out some of the Windows system files related to extraneous crap you don't need, but that's more detailed than I'm comfortable trying to guide you through over the web, specially since I can't guesstimate your needs.

Anyway, hope this helps.

share|improve this answer

To recover some space, and only if you don't use automated backup programs, type in

FSUtil USN DeleteJournal /N C:

in the command prompt.

However, to free up most of the space, you will likely need to remove the system restore points and backups (volume "shadow copies"); follow the instructions here and/or here.

share|improve this answer
What does your FSUtil Command do? – Sam Mar 9 '12 at 12:57

You may use treesize free edition ( ) to see what directories and files are using disk space. Maybe you find some temp files that you can remove.

share|improve this answer

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .