Shrink install.wim

Back in March, I posted about the actual size of Windows 10 images over time , which resulted in the table below. And then in April, I posted about going through additional attempts to reduce the overall size of Windows 10 images, without much success.

The install. That saves a few hundred megabytes. An improvement, but still not great e. So maybe it can be compressed better. If you go back to the Microsoft white paper that describes the WIM file format which yes, is still published as an RTF file , it talks about these:. So based on that, if we export that image but specify a different compression type, it should take longer because it has to decompress and recompress the entire content , but the resulting size should be different:.

So what happens if we try that? So how is that possible? So how did it do that? Some of you might remember this compression algorithm that appeared around the time of Windows 8. So why not? Alright, so you can export your own file. If it's unable to complete for example, the computer is turned off when not in use then the task scheduler runs more often, and the task may run while the system is not idle.

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