This one is a real BEAR. I bought a new Dell 5810 workstation with 1tb ssd, 32 gig ram and Windows 10. It was ordered with an Nvidia graphics card. Everything operated 100% except for intermittent unpredictable cursor movement. The cursor would take perhaps 4 or 5 jerky movements in response to one smooth flowing movement of the mouse. Sometimes the cursor would not move for .5 seconds or so after the mouse stopped. At that point I had only installed Chrome and one audio card. The audio card was a current Soundblaster by Creative Labs. One feature that I could not do without was a functional equalizer that came with the audio card AND have it operational with the optical output on the card. Neither Dell nor Creative could make it work. Creative subsequently admitted that due to a firmware change that my requirement was no longer a possibility. So, I then installed a very similar card with virtually identical features that I had used in a Dell T7500 workstation. This card did what I needed it to do and upon installation into the new pc also worked perfectly. I had only ordered the new card due to it being certified to work with Windows 10 Pro. Obviously it did not. After very significant troubleshooting by Dell Pro technicians and even being escalated to Dell's "High Complexity Division" they finally suggested that they replace the entire pc with another brand new one.The new one also has the same exact problem. I did not experience this problem when the audio card was in the T7500 six year old pc. The card I am using is the Soundblaster Z series with an external component containing input and output jacks, microphones and tiny speakers.
I can only assume that since the only hardware that I had added to both new systems is the audio card that there is a good chance that it has something to do with my difficulty. All drivers are up to date. There ARE articles on the net suggesting a link between Chrome and soundblaster cards, however the offered solutions are above my level of ability to attempt implementing any of them.
I can offer a great deal of further information surrounding this situation but will wait for the Experts to suggest what more information they wish to have. Just ask. Please be aware that it is extremely difficult for me to predict when and the amount of time I will have available to reply quickly to posts. I REALLY want to get to the bottom of this situation and will respond as quickly as I am able to. I don;t want to clutter this question with information that the Experts do not need. One bit of info though: I am using a brand new Microsoft wireless keyboard with matching mouse with the model number of 5050. However, I did substitute it with another identical set with the same problem showing. I then used a standard wired keyboard and mouse with no improvement.