Go to start/run type in msinfo32 and enter, this will tell you which programs are running in the background, and lot of other info.You can also enter msconfig in the same field.Chose"selective startup,run sys ini.,and run win ini. boxes only.Then apply,with this still open go to startup tab,select system tray and scan registry and any antivirus related check boxes,apply and reboot,this will solve the problem.