What are the speakers mainly discussing?

W:Sean, make sure you have your virus protection running at all times. Maria got a virus yesterday and lost some of her work. Now she has to reinstall everything on her computer.
M:That’s too bad. It happened to me once at home last year. I got one of those worms that erased everything on my hard drive. After that, I’ve always made it a habit to check my computer when I start it up.
W:Good. The tech department is supposed to install new anti-virus software starting tomorrow.
M:They should. It doesn’t take that long to do, and it’s better to be safe than sorry.
Number 53.What are the speakers mainly discussing?
Number 54.What is mentioned about Maria?
Number 55.What will happen tomorrow?