14 DAY TRIAL // KB3135173 is the very first Windows 10 cumulative update that comes with a change log, but as we’ve already told you, it seems to be doing more harm than good.
While some users cannot install this update at all, those who do manage to deploy it complain that KB3135173 automatically resets their default apps, reconfiguring Microsoft’s solutions as the default options for browsing or viewing photos.
InfoWorld is reporting that KB3135173 resets all default apps on a Windows 10 computer, so in case you were using Google Chrome or Mozilla Firefox to browse the web, the chances are that Microsoft Edge is now the default option.
Posts on TechNet confirm that KB3135173 makes unwanted changes on Windows 10 computers, but it’s not yet clear if the same behavior is experienced on all PCs (we’re not seeing any change to default apps after installing this cumulative update on our computers here at Softpedia).
Apps getting reset again after reboot
“I set my browser default to IE11, and for some reason after the recent windows updates(KB3135173 or KB31224262), I continuously get notifications stating that ‘An app default was reset - An app caused a problem with the default app setting for .html files, so it was reset to Microsoft Edge.’ The notification is so frequent that I have disabled all windows notifications in order to work sanely,” one user explains.
What’s even worse is that some users are getting their default apps reset regularly, so after replacing the built-in apps with their own, the configuration is once again reverted to default after a reboot.
“I'm having the same problem with my image program of choice, Irfanview. EVERYTIME I tell irfanview to retake the default for jpg, png, etc, the OS annoyingly claws them back with repeated ‘an app caused a problem’... i did NOT have this problem before today's updates to the OS,” another user confirmed.
Certainly, this is unexpected behavior from an update that was supposed to only bring improvements on Windows 10 computers, so we've reached out to Microsoft for more information and will update the post should we receive any detail on what’s going wrong on these PCs.