I have just realised that my PC loaded many strange program when I open up the System Information/Software Environment/Startup Programs folder.Program Command User Name Location_004551_.tmp _004551_.tmp.dll NT AUTHORITY\SYSTEM StarupSET120A set120a.tmp ...Are these program suppose to be running? If not how do I remove it?

Hi JoeLim07, 1. Run online virus scan and check if any malware or virus activity found on the computer. You may run online virus scan from the below link:http://onecare.live.com/site/en-us/default.htm 2. Use disk cleanup tool an delete unwanted programs and temp files from your computer, you may refer the below link on steps to use the tool:http://support.microsoft.com/kb/310312 3. Perform clean boot and narrow down on the application causing the issue. You may follow the stps from the below links:How to configure Windows XP to start in a "clean boot" state:http://support.microsoft.com/kb/310353 To isolate problems using the Startup tab:http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/msconfig_selective_startup.mspx?mfr=true Regards:Samhrutha G S - Microsoft Support.Visit our Microsoft Answers Feedback Forum and let us know what you think.