Here is the Dell Support troubleshooting guide.
https://www.dell.com/support/kbdoc/e...shooting-guide
Note:
Check to see if there are new drivers for the Track pad, and Stick pointer.
Microsoft recently did a update, and people have been reporting that afterward,
their Track pad or Stick pointer was acting erradically, until they upgrade the drivers.
Signed: Ensign Tzap