Thank you so much...ALL of you for helping me in this problem. What i did was just an easy process. I have just reformatted the PC, only the C:, and install a Kaspersky Anti-Virus Trial Version. It requested to connect to the internet because of some infected files in DLL types. Some of it are malicious codes that causes harm to the PC, that's what I've suspected. After it, it asked to disinfect all those infected DLL files and asked to restart the PC. Anyway, the scanned viruses, worms, trojans and other harmful shits were 800+ as detected by the KAV. That's what I did. All of there things were caused by those fucking stuffs. We'll, I can't blame myself nor the PC. I have blamed the users in a Branch where all of them are STUPID. That's what I've learned in college. As an IT, we have all there STUPID USERS. lol