Mouse lag with usb 2.0 adapter

Mouse lagging on dual monitor setup on my desktop dell pc. Lag is only on the secondary (extended) monitor which is hooked up by plugable usb 2.0 adapter model: usb-vga-185. Windows 10 pro 64 bit. Mouse is a dell wired mouse. This set up worked for the first four months, but now inexplicably developed a mouse lag issue.
So far I have used the cleaner to remove the software and re-installed the software according to instructions on your support pages, but lag persists. Have removed and reinstalled usb drivers as well.
Any help in resolving this would be appreciated.
Thanks!
Dean

Hi Dean - closing this thread since I saw your direct email to us first.