, originally introduced with Windows 8 and Windows 8.1. While standard WIM files use LZX compression (compression ratio around 1.5–2×), ESD employs an advanced compression algorithm (often referred to as LZMS with solid compression) that can achieve ratios of 3–4× relative to the raw installed system. The same 31 editions stored in ESD format occupy only approximately 7.2 GB for x86 and x64 combined, small enough to fit on a dual‑layer DVD (8.5 GB) or an 8 GB USB flash drive after slight capacity overprovisioning (actual file size varies between 7.2 GB and 7.4 GB depending on included updates and drivers).
: These images are entirely unofficial and are built by third-party hobbyists. There is no guarantee that the image hasn't been injected with rootkits, spyware, or keyloggers that standard antivirus software might miss. windows 7 sp1 aio dualboot 31in1 oem esd eses upd
, originally introduced with Windows 8 and Windows 8.1. While standard WIM files use LZX compression (compression ratio around 1.5–2×), ESD employs an advanced compression algorithm (often referred to as LZMS with solid compression) that can achieve ratios of 3–4× relative to the raw installed system. The same 31 editions stored in ESD format occupy only approximately 7.2 GB for x86 and x64 combined, small enough to fit on a dual‑layer DVD (8.5 GB) or an 8 GB USB flash drive after slight capacity overprovisioning (actual file size varies between 7.2 GB and 7.4 GB depending on included updates and drivers).
: These images are entirely unofficial and are built by third-party hobbyists. There is no guarantee that the image hasn't been injected with rootkits, spyware, or keyloggers that standard antivirus software might miss.