norton pc checkup

hello,

       i got a new toshiba laptop awhile back and it came with the norton pc checkup installed on it.  we also purchased the webroot secure anywhere protection. my question is with the webroot which scans everyday do i still need the norton. and the norton does a laptop checkup (whenever it wants to i guess) because then the norton box pops up and tells me my pc is running slow (it isnt) and all these issues i need to take care of. but when it happened today i immediately ran the webroot scan and it came up with 0 threats and it has been running just great. also the reason im a little nervous about doing anything with the norton box that pops up and says my pc is running slow is because a year or so ago on my old laptop i got a virus because of a box that kept popping up on my web browser saying there were problems that needed fixing on my pc and i dont want to go through that again. any info would be appreciated thanx!