I have just bought my laptop 2 months back and it was giving me around 5 hours of battery backup up until yesterday. Since i have booted up my laptop today its giving me just a little over 2 hours of battery while doing the same task, web browsing, movies, netflix. So the battery life has effectively cut in half over night. I have tried to check battery setting, background tasks and no luck everything seems normal. Could a virus or corrupted windows be a reason?