I think you can try the following:
1. Update your RealTek audio drivers.
2. Pure Networks was acquired by Cisco Systems, Inc. which makes software that helps people easily set up, manage and secure a home or small office network. See if they have updates opr you may want to uninstall and reinstall the software.
-- it could be pacer.sys is conflicting and vice-versa with either one or both and my suspicion is the latter because the more I research the more pacer.sys belongs to the Windows Core set of drivers for networking.
3. For the hotfixes you'll have to go directly to Microsoft.
* My first best guess here is to tackle the Pure Networks software first.