frustating

Friends when i run my system it makes sound it may be fan sound even when i go for standby or hibernate my system makes sound. From the very first day i bought system(6 months back) it is making sound, my friends told it is normal since it is dual core. The sound is frustating me. Configuration...

Friends whenever i insert the pendrive in my system i find folders which pretend to be microsoft corporation, when i delete them it again comes back,eventhough it is not harming my system it is frustating can anybody please solve my problem. Even i cannot format my pendrive it says generic...