
1) Check you available disk space - For now the best information available is as follows: Free drive space required: Stand-alone installation (DVD.ISO or SP1 Download) X86-based: 4.1 GB X64-based: 7.4 GB Installing SP1 using Windows Update: X86-based: 750 MB X64-based: 1050 MB Note: I would be more inclined to use the following values when using Windows update: 32-Bit / X86-based: 1.5 GB, 64-Bit / X64-based: 2.6 GB 2) Run Disk Cleanup. Windows 7 SP1 requirements: Note: This link has been updated to the RTM (final) system requirements and available as of Feb. How to increase you chances of installing Service Pack 1 successfully. If Service Pack 1 is listed under Windows edition, SP1 would be already installed on your computer. The basic information about your computer page will open. To check if Windows 7 SP1 is already installed, follow the below steps: Click the Start button, right-click Computer, and then click Properties.
