I am far from an expert but it sounds like your cmos battery is shot. this is the battery that gives your holds the boot information in your system. some of them snap in and some solder. if it was a desk top it would it would be a pretty straight forward job, pop the case and change the battery. it is the same process with a laptop but the case is harder to get into.
i am a student of diploma in electronics and telecomm
can anyone suggest me projects related to the below domains:-
electrical and electronics