This is a very common laptop issue, which has to do with the touchpad or the pointing stick acting flaky. You can read through these Google results and hopefully find a fix that works for you.
It starting after you installed Plus! is just a coincidence.
typing jumps?! - by greenee on 04-18-2009 at 02:48 PM RE: typing jumps?! - by Vilkku on 04-18-2009 at 03:09 PM RE: typing jumps?! - by Adeptus on 04-18-2009 at 11:35 PM RE: RE: typing jumps?! - by sasha1555 on 04-19-2009 at 12:01 AM
