bro, i doesnt have much programme running in this pc, my pc running window vista. ive been using regucre to scan and correcting the errors, its look like the file path and the registry never been corrected ever since.. ( the roots of the problem is im using avast free anti virus software, the other day, while cleaning the pc, i saw a few virus and trojan in the vault, i tot deleting it for goods, and before i go on to deleting. it prompt the mssg ''it will clash ur registy and bla bla, r u sure u wanna proceed?'' ..i just ignore it.. and after that.. become like this lor... sigh... tq for ur reply bro. i appreciate it.