We understand you have replaced the original wireless adapter for the Intel® Dual Band Wireless-AC 7260, correct?
Before we go any further, we would like to inform you that Intel does not support integration which is when the original adapter installed by factory is replaced by another one. Check this link for further information on this matter: Regulatory Information Regarding Hardware Installation or Upgrade In cases like this, we recommend that you first contact your computer manufacturer in order to obtain the latest drivers.
With that being said, please bear in mind that, only the OEM can tell you which wireless adapter is fully compatible with the type of system you have. There is a chance that the adapter may not be fully compatible with your system. Please give us more details on the issue so we can see if there is anything else on our side that we can do to assist you.