My computer is notebook computer HP compaq nx6320 and Windows XP professional service package 2 and previously i using AVG antivirus. On a day my computer is infected by virus so i make a scan by using a software to delete the infected file and malware in the safe mode, Then, my task manager suddenly cannot use and the AVG also cannot function after the scan. So i uninstall it and install avast antivirus. Then starting from that time my task manager cannot run already, once i press ctrl alt del it run then close. I try many suggestion from the website, but also can't recover my task manager.Somebody help me to recover my task manager please.....Thanks.