You don't need to delete aud.ini again that's not going to do anything...
Just pasting in some generic advice here...
Advice is generally (no particular order)...
1) Update audio interface drivers and firmware to latest. I strongly recommend removing old version and rebooting afterwards. Then when new one is installed reset the settings everywhere on the interface.
2) Temp disable your virus scanner. Before you do that though scan for your system for viruses and malware. Ie with AVG and Malwarebytes.
3) Make sure your audio interface is disabled in windows control panel sounds
4) Make sure the interface is plugged in USB2 socket. Not USB3.
5) Defrag. Don't use third party defrag utilities that monitor your system.
6) Update your display drivers
7) Update the rest of your drivers and firmware everywhere. eg controllers.
8) Disable unnecessary startup programs and services. Remove unnecessary applications from windows add/remove programs. Google and research this. Warning do not disable security features.
9) Update your motherboard chipset drivers (try Intel driver update site) and BIOS
10) Check windows event viewer for bugs.
11) Try deleting AUD.INI (google for details)
12) Check windows device manager. Can you disable any drivers you don't need? eg HDMI drivers.
13) Check task scheduler to make sure nothing is running whilst using your DAW. Google 'windows event viewer' for further details.
14) Make sure CPU in windows power settings is set to 100% for min and max. Optimize your drivers for power management.
15) If you have ASIO4ALL remove it!!!
16) Tools latencymon, process monitor and process explorer are your friends here.
17) Run windows update!
And always backup