I purchased a new keyboard recently and in testing it, I noticed that the Numpad "+", "-", & "/" keys only work when I press the Shift key. I swapped out the KB with the old one with the same result. It works properly in Safe Mode with the new KB and the old. I have checked my KB options and have Sticky Keys and Filter Keys off. Having NUM LOCK, CAPS LOCK, and/or SCROLL LOCK on or off has no effect. I was using EVGA Precision OC, but after reading a somewhat similar post on a separate thread I uninstalled it, to no avail. I'm not sure how long the problem has been occurring, just that I noticed it after installing the new KB back in January. I'm running Windows 10 Pro, but maintained my Windows 7 installation on a separate hard drive. The KB functions properly in Windows 7, so it appears to be a software problem in Windows 10. Any ideas would be appreciated as I am at a complete loss on this. If any further info is needed, I'll provide what I am able. Thanks in advance.