Based on GOG v1.5 release: setup_the_witcher_enhanced_edition_1.5_a_10712 (9,662,239,219 bytes)
Seven additional adventures are included
Bonus Content (3.7 GB) added
100% Lossless & MD5 Perfect: all files are identical to originals after installation
NOTHING ripped, NOTHING re-encoded
Selective Download feature: you may skip downloading and installing of bonus files and voiceover packs you don’t need
Significantly smaller archive size (compressed from cumulative 12.7 to 3.4~10.1 GB, depending on selected components)
Installation takes ~7 minutes for one language, no bonuses
After-install integrity check so you could make sure that everything installed properly
HDD space after installation: up to 17 GB
Language can be changed in game settings
At least 2 GB of free RAM (inc. virtual) required for installing this repack
OS: Microsoft® Windows® /XP/Vista
DirectX Version: DirectX 9.0c
Processor: Intel Pentium 4 2.4 GH
Memory: 1 GB RAM
Hard Drive: 15 GB Free