hai
i saw this sme problem in another system of my friend,on that system i saw when we type w it shows as w+++++++++ and + continues till we press backspace so that problem was due to error in os,i...

from my previous answer i want to edit more and that is there is one more thing to check and that is wether your cd writer softewere like nero or alcohol is working or not i can also cause such...

hope u rr laptop is used by a single person,because problems in laptop come frequently in key boards touch pad due to more users in single laptop,keyboard in laptop is totally different normal...

i hope u r cd drive is working as usual while reading dc or dvd but u r cd drive is not detecting a plane cd to burn,ie u r cd writer is not working in u r cd writer.please show this to a computer...

i think u r ups is powering to u r u r sound system as well as u r pc,but normally there wont be any problem like reduction of back up time etc.so first unplug u r pc power connector and sound system...

hope u r hp writer is connected with cpu but i think u r cd writer is simpally connected in to cpu but the data cable is not connected properlly with it,this can cause such problems,another problem...

hope u r hp printer should work as wireless,4 that u can connect it to inferared connector so that u can use through infrared facility,hope it will help u,please scrap if u get any new ideas