There is nothing particularly alarming, other than your choice of Symantec...
We cannot be particularly helpful until you tell us the brand, model, and age of your computer equipment, and how you are connected.
Slowness comes from infestations or inadequate memory, or slow hard drives, or inadequate free space, or configurations that are out of date...
Perhaps if you help us by telling us more, we have a better chance and offering help and advice.
