I wonders that these below files are belongs to Window or some spy-software. These are : winhost32.exe, stcloader.exe, wincore.dll, winupd.dll. I used pestpatrol software to scan and found them. If they are unnecessary, can I remove them? By the way, what are functions of file rundll32.exe and svchost.exe? Thank so much I want to explore Computing

Here's a very useful page - describes what a lot of your background programs actually do. http://www.liutilities.com/products/wintaskspro/processlibrary/

To find out what each Startup(or Process) item does or means, and any recommendation as to if you should close the process: Task List Programs

I do not have the first 4 on my machine, May be associated with a program you have installed. Suggest you do a google search for them. rundll32.exe and svchost.exe are necessary files for XP.

http://www.kephyr.com/spywarescanner/library/ ------------- Process File: stcloader or stcloader.exe Process Name: Stcloader Description: Popup adware by 2ndThought software. Company: 2nd-Thought.com System Process: No Security Risk ( Virus/Trojan/Worm/Adware/Spyware ): Yes Common Errors: N/A ------------------- TargetSoft.winhost32 Overview TargetSoft.winhost32 is bundled with FreeWire 3.2.3 but not mentioned in the EULA. TargetSoft.winhost32 is developed by Virtumundo, Inc. (winhost32.exe contains "This file is the property of Virtumundo, Inc."). winhost32.exe is connecting to the internet after rebooting. Classification Adware Files winhost32.exe Vendor VIRTUMUNDO, INC. Uninstall procedure I was unable to find an uninstall entry for this in the "Add/Remove programs". Manual removal Please follow the instructions below if you would like to remove TargetSoft.winhost32 manually. Please notice that you must follow the instructions very carefully and delete everything that is mentioned. In most cases the removal will fail if one single item is not deleted. If TargetSoft.winhost32 remains on your system after stepping through the removal instructions, please double-check by stepping through them again. Delete the following file: %SystemDir%\winhost32.exe Note: %SystemDir% is a variable (?). By default, this is C:\Windows\System (Windows 95/98/Me), C:\WINNT\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP). ------------------- Wincore.dll - Parasite for sure not much information available. ------------------- Type : File Data : winupd.dll Category : Data Miner Comment : Object : C:\WINDOWS\system32\ FileSize : 152 KB FileVersion : 0, 403, 29, 1730 ProductVersion : 1, 1, 0, 0 Copyright : Copyright 2003 InternalName : winupd.dll ProductName : TargetSoft Created on : 4/19/2004 5:52:30 PM Last accessed : 4/20/2004 4:26:30 PM Last modified : 4/19/2004 5:52:31 PM ------------------- The last two DLLs are not registered with Microsoft. No information available. ------------------- Process File: rundll32 or rundll32.exe Process Name: Rundll32 Description: Microsoft "Run a DLL as an App". RUNDLL32 is the Microsoft Windows program that loads DLLs into memory so that they can be used by specific programs or by Windows. Company: Microsoft Corp. System Process: Yes Security Risk ( Virus/Trojan/Worm/Adware/Spyware ): No Common Errors: N/A ----------------------- Process File: svchost or svchost.exe Process Name: Service Host Process Description: Application that works as a host process for services that run from dynamic link libraries. Company: Microsoft Corp. System Process: Yes Security Risk ( Virus/Trojan/Worm/Adware/Spyware ): No Common Errors: N/A ----------------------- http://www.liutilities.com/products/wintaskspro/processlibrary/ V. Satya Ramachandran For more help : satya_ramachandran@adp.com Include problem link in mail

Wow. Thanks so much all you gave to me. You are best friends. Thanks I want to explore Computing