Windows 10 Technical Preview Build 10049 now available

Kari said:

I have updated the tool today, I see from your screenshot that you are still using the old one.

Take 2...

Edwin said:

Working on it as well, I'm gonna need to do a clean install, too many things going haywire!

None on mine so far.. but the longer I use Spartan, the more bugs are hatching...

Edwin said:

Good to go!

Ditto!

The new tool is faster @Kari ! Thanks again!

One disappointment was to learn that in Audit Mode (signing in to Audit is automatically done with built-in admin account) you cannot run Spartan.

badrobot said:

Ditto!

The new tool is faster @Kari ! Thanks again!

Did you read the comparison between the ESD and WIM based ISO images? This quote from the tut, added this part today:

​Some facts to help you to decide, the numbers about Build 10041 ISO image created with this tool:

1. WIM based ISO, Windows 10 Build 10041 32 bit, size 2.45 GB, ISO created from the ESD in 6:57 (Min:Sec)
2. ESD based ISO Windows 10 Build 10041 32 bit, size 2.09 GB, ISO created from the ESD in 3:32
3. WIM based ISO, Windows 10 Build 10041 64 bit, size 3.30 GB, ISO created from the ESD in 9:40
4. ESD based ISO, Windows 10 Build 10041 64 bit, size 2.68 GB, ISO created from the ESD in 4:35

Above times to create the ISO using this tool using an HP ProBook 4530S i5 laptop.

Because the ISO based on ESD intead of WIM is more compressed and encrypted to save space, Windows needs to do more decompressing and decrypting when using it. The difference is not significant but to give you an example, installing Windows 10 to a Hyper-V virtual machine took using the 32 bit Build 10041 ESD based ISO (#2 in above list) 15 minutes (from boot to first Settings dialog after the installation), and using the same Windows version but a WIM based ISO file (#1 in above list) 12:35. Both virtual machines had exactly the same settings, the virtual hard disks were created on the same drive on host, and the host was not used for anything else during the installation.