How to download the ISO file for build 10074 and create an Installation DVD or USB. April 30th, 2015
Details 1) Download the appropriate .ISO file for build 10074 using the links listed below. Product key: 6P99N-YF42M-TPGBG-9VMJP-YKHCF (This new key could signal a change in end user upgrade abilities. However it is not required when upgrading from an earlier build and still may be for mitigation purposes only)
2) After downloading the correct .iso file install HashCalc and validate the SHA1 hash value is correct. HashCalc: http://www.slavasoft.com/hashcalc/index.htm (Note: If the download is not corrupt, the value HashCalc returns will match the SHA1 value.)
a) Launch HashCalc and navigate to the location of the .iso file you downloaded. (The default download location is: C:\Users\User account name\Downloads) b) Remove all check marks from the list of HashCalc options except for SHA1. c) Click the ‘Calculate’ button and wait for the SHA1 string of letters and number to be displayed. Note: The hash value is not case sensitive as upper and lower case letters are considered the same.
3) Next use ImgBurn (or Gear ISO) to create a bootable DVD. ImgBurn: http://www.majorgeeks.com/files/details/imgburn.html Note: When installing ImgBurn, choose the “Custom Installation (advanced)” option and remove the check mark(s) to eliminate unwanted options, including Optimizer Pro (I do not accept) which is not needed. Burning ISO Images with ImgBurn article: http://neosmart.net/wiki/display/G/Burning+ISO+Images+with+ImgBurn (The steps are the same for Windows 7, Windows 8 or 10), except you are not creating a Repair disc but a full installation DVD) Note: Always use high quality DVD+R media and the slowest burn speed (4x or 6x) if offered a choice. Note: Skip to step #4 to create a bootable Flash / Thumb drive.