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I have a Logitech wireless keyboard (K800) and mouse (M310). Recently I have experienced the loss of the settings for the K800 (specifically the disabling of both Caps-Lock and Ins keys). In desperation (after searching the Internet), I called Logitech Customer Support. After a fairly long conversation (1+ hours), I uninstalled all Logitech products and downloaded the latest version of Logitech Options. As an administrator I set the Caps-Lock and Ins keys disabled, and restarted the machine as a standard user. All worked as expected.
What went wrong? I was advised that Logitech updated the firmware for the K800 and M310 devices. Then, wholly separately, they made available an updated Logitech Options version (8.10.154). I was unaware of the firmware update and, because I use Windows 7, I was not advised through Windows Update. I was also advised that settings should be made from an administrator account.
I am disappointed in Logitech. They created turmoil for users of their wireless products. I suggested a solution to the CSR that I doubt will get to the developers. Too bad - I like the wireless keyboard and mouse.
If a firmware update is independent of a software update, the problem may occur. Generally between the time that the firmware is updated automatically and the time that the software is manually updated. In the case of Logitech, the firmware controls the actual devices and the software (Logitech Options) is the windows application that allows its users to communicate with the devices. So, if the two (software and firmware) get out of sync, difficulties can arise.
What is worse in this case is that the Win 7 user is unaware of the firmware update and does not know of the need to update the application software. Logitech should have been aware of the still-large number of Win 7 installations. Further, they should have been aware that Windows Updates is no longer applicable to Win 7. Their firmware design should have included a notification that a software update was required.
I have been using Logitech keyboards and mice for at least 20 years, but never ever experienced any automatic firmware update. Maybe I never checked off that I wanted any such service, or maybe none of all the Logitech pieces that I have owned over the years have had any firmware update.
Or possibly that there has been a lot, but they have been so quiet that I never knew of them.
For the last years, Microsoft supported Win 7. I think the problem with failing to save settings was Logitech self-inflicted. I don't know how they did it. I just know what I said in the original post.