Question: My computer keeps asking me to update but I don't know whether I should say yes?
Say yes and do the update! The sooner you apply the update, the sooner you are protected from any vulnerabilities!
Whether you have a PC, a Mac of are running Linux, all computers need to be updated periodically to ensure they are as protected as possible. Viruses and Hackers go for the low-hanging fruit - that is - the machines that are easy to take over because they were not updated. You should plan that an update can take as long as an hour, but usually take about 20 minutes so plan accordingly. The best times are right before lunch, or at the end of the day when you're finished using it.