Microsoft released Build 14959 for PC and Mobile 10.0.14959.1000 for fast ring insiders. Like every other insider builds, this one also comes with issues. Check out the list below.

Known issues for PC 14959.1000

  • If you have a 3rd party antivirus product installed on your PC, your PC might not be able to complete the update to this build and roll-back to the previous build.
  • Internet Explorer may crash a few seconds after launch and working.

Known issues for Mobile build 10.0.14959.1000

  • If you used the previous ‘date change’ workaround to update to Build 14951 or Build 14955: Please don’t use it any longer! The Microsoft account (MSA) ticket on your device needs to expire and then you’ll be offered today’s build. If you changed your date by 30 years… you’ll want to do a device reset.
  • You will be unable to install additional languages, keyboards, and speech packs on your phone for the next few weeks. If you have existing languages, keyboards, and speech packs installed – they will carry over when you update to new builds. You just can’t install any new ones. If you do a hard reset of your phone on these builds – you will also be unable to install additional languages, keyboards, and speech packs. You can use Windows Device Recovery Tool to go back to Windows Phone 8.1 or Windows 10 Mobile, install any languages, keyboards, and speech packs you need and then update to the latest build in the Fast ring as a workaround.

Fix mobile download stuck or installation fail issue

What’s new in Mobile build 10.0.14959.1000

What’s new in PC build 14959.1000


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