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After I upgraded to Windows 10, free disk space went from 100 GB to 5 GB on my 205 GB system disk over the course of about two months. I am not aware I installed any programmes that could cause such drop in free disk space.

I tried Disk Cleanup, but it did not free much disk space.

What are some tips reclaim the disk space on Windows 10?

Any help is appreciated.

marked as duplicate by Community Mar 1 '16 at 11:47

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  • 2
    The correct to tool to help answer this type of question is WinDirStat. Run it as Admin. – Daniel B Mar 1 '16 at 6:12
  • @DanielB WinDirStat helped me solve the problem. In my case I had large SQL Server error log files on the disk. – Martin Staufcik Mar 1 '16 at 11:50
  • @MartinStaufcik Make an answer for this then. – ThisIsNotMyRealName Mar 2 '16 at 5:46
  • @MartinStaufcik This question has been marked as a duplicate, it cannot be answered anymore. – Daniel B Mar 2 '16 at 10:06

When you upgrade to Windows 10, your existing Windows folder is renamed to C:\windows.old

Apparently this should be automatically removed after a month or so, but the following shows instructions for manually removing it, if you need the space...

The link to the article for manually removing is Here

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