Hi there and welcome
Is it doing this when you are typing?
Or when you are actually using the mousepad?
ok, if you use an external mouse do you have the same issue?
ok, can you connect one as a test and tell me what then happens please?
ok then on this model we cannot test.
This only happened after the udpate correct?
ok, did this happen after the last update?
ok, I want to do a system restore please.
To do this, close all programs.
Press the windows key + X and click on Control Panel
click System and Security
Then click on System
Then System Protection
Then System restore
Choose a date before this problem occurred.
Let it complete and tell me if it now functions correctly please
did it complete the restore successfully?
Do you have any data you need to keep on the Tablet or everything is backed up?
ok we can try to repair it but almost certainly we will need to do a reinstall.
Are you able to check about the data and programs?
As the data and programs would need to be added back
you can return here, this is no problem.