This Is the material with respect To Upgrading And reparing PCs book...
http://ptgmedia.pearsoncmg.com/imprint_downloads/informit/que/upgrading/fourteenth_edition/DVD/PCs6th.pdf
link and you can download it from the above said location.
Working and lectures of Microcontrollers
http://nptel.iitm.ac.in/courses/Webcourse-contents/IIT-KANPUR/microcontrollers/micro/ui/Course_home1_1.htm
http://ptgmedia.pearsoncmg.com/imprint_downloads/informit/que/upgrading/fourteenth_edition/DVD/PCs6th.pdf
link and you can download it from the above said location.
Working and lectures of Microcontrollers
http://nptel.iitm.ac.in/courses/Webcourse-contents/IIT-KANPUR/microcontrollers/micro/ui/Course_home1_1.htm