I am getting this message the second time even after replacing the battery. Previously, I was getting this message on my windows 7 and I had to change the date and time everytime after starting the windows in order to work on the internet. Almost 3 weeks ago I replace the CMOS battery and everything was working fine untill 2 weeks after replacing. However, from the last week I am getting the same message again during startup. Can anybody tell what is the actual issue?