Just a few hours ago, Microsoft released Service Pack 1 final for Windows 7 and Windows Server 2008 R2 operating systems. As the download size of SP1 x86 installer is over 500 MB and x64 is over 900 MB, many users are asking about the free disk space required to install SP1 for Windows 7.
For those concerned about disk space, check out the below chart to know Windows 7 SP1 disk space requirements.
Windows 7 Disk Space Requirements
Once the SP1 is installed on your PC, follow recover lost disk space after installing SP1 guide to free up lost space. Please note that you need to uninstall Service Pack 1 Beta or Release Candidate before installing the final build.
Also read how to slipstream Windows 7 Service Pack 1 into installation DVD or ISO.