HP Compaq Presario that runs 24/7

I have an old HP Compaq Presario laptop that runs Windows XP for 24/7 without unplugging the battery. I want to know if this is advisable that the laptop is working all the time. Is it secure or will it cause harm to my computer system? I downloaded and installed Windows updates that sum up to a huge file size. Please send me some advice regarding this matter. Thanks.
