mike_mccue
Why doesn't the uninstaller just uninstall everything?
That always seems like the final insult when I am removing a program that has earned itself an uninstall.
I agree...
But an uninstaller almost always leaves lots of remnants behind (folders and registry).
It sounds like the OP might be experiencing a driver related issue (for the Tascam unit).
I'd check the system's DPC latency.
Also, make sure the Tascam isn't connected via a USB3 port. Many USB2 audio interfaces have issues when connected via USB3.
This is especially true if those USB3 ports are 3rd-party (not integrated into the Intel chipset).
If the OP has a backup image file (prior to the issue), I'd recommend reloading that backup image file... and checking performance.
Once the issue is resolved, I'd use True Image or similar to create an up-to-date backup image file.
That's cheap insurance against this type of issue (moving into the future).