My Laptop Acting Weird

My antivirus in my laptop was already expired and I did tried to renew today but my laptop acting weird when I did clicked the renew subscription of my antivirus it doesn’t work and it really annoys me. Perhaps a problem with it is why it is acting weird. I really need to renew my subscription or else my laptop will down especially sometimes I use it for blog hopping or do surfing online. I do not want my computer will crash because of any viruses or any malware in my computer. I will just do it tomorrow since my laptop acting weird today.