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#240
Slipstreaming as it commonly referred to is an option typically used when performing a clean install of the OS. You should manually visit the Chuwi support site or alternate site if found for verifying present 10 updates and if not found 8.1 updates for the model you have there. If electing to later see a clean install by way of usb media you would uncheck the automatic check for updates having the correct updates especially if 64bit for 8.1 being the closest to what 10 needs in order to see that media either slipstreamed or simply keep the correct updates on a second flash drive for manual installs once 10 goes on clean again.
Here with problematic upgrades on laptops the entire OEM primary is simply nuked and a brand new custom primary would go on followed by the manual search when the 10 WU fails which so far hasn't on laptops while it has for older expansion cards on the main desktop.
If you didn't the Redstone 1 Anniversary update arrive within a day of the release for most on August 2nd it won't be coming in on it's own! The updated MC Tool or direct download of the Windows iso file will be necessary. Here I simply never waited since when looking enough time had already passed and at first used the save option with the MC Tool to grab the RS1 iso and called it a day. Later I got the other two 32bit and 64bit dual edition isos to keep onhand. From a separate partition or drive you then simply mount the iso to run the upgrade into the RS1.