Ответ на "How can I fix my laptop?"Download that file from the internet then restart your system. and if this will not work go with online technical support.
Ответ на "Is there a problem with my battery?"I think you battery is damaged and first thing you need to do please change your battery because a damaged battery can harm laptop as well. According to me for laptop support service you need to take help from experts.
Ответ на "My laptop is running slowly, what should I do?"I would like to recommend to clean up your laptop like all deleted files, temp files, order to improve your pc performances and get rid of malwares, check for viruses, Scan your laptop. Make sure don not place too much files on the desktop. If still you are facing this problem then i must say you need to ask from experts. - http://www.maintainmypc.com/technical-support/laptop-netbook-support.php