Unable to browse control panel and other items from Win 2000

it appears you could be infected with malware.

download Malwarebytes from www.malwarebytes.org
you may have to run it in safemode if your pc is as bad off as you say it is.

as it is my Production Box:windows 2000 Server, so i need to take down time to run any tool on it.will there any backup required before running this tool..?

I am able to browse my computer and able to browse any folder except winnt in c drive. but not able to sea even netwok properties:server getting hanged-to get the server back i have  to make it end task,box is alredy patched with latest updates..and Anti virus(mcafee) is updated.
What to do now...?

You can run the tool without taking the server down to detect items, but you always run the risk of a service getting stopped once you tell it to remove the infected items.

I tried the suggested tool, but nothing was found on my server, and again I am getting the same problem. it resolves the problem on temp. basis if I reboot the server. and now I got the same problem after 5-10 days.
Any other better suggestion&?

Any suggestion, Now I am getting the same problem on 2 Win 2k boxes.

I tried with Antimalware &SP 4 reinstallation, but no result unable to browse any item related to Winnt,getting hanged when click on winnt folder.....?

Are you connecting remotely?  Are you logged in as Administrator?
http://www.computing.net/answers/networking/scheduled-tasks-share/30160.html

yes I take the RDP  from here to Client machine, and the ID we are using having required(my ID is added in a group  which is added in local Admin group of Machine) access for Webadmin like, I m working as Webadmin m using this id since a long time.
Problem is not only with scheduled task, even I am unable to open WinNT folder and other Item like: control panel/IE/Add Remove programs, Network properties and other item related to WinNT...!
When i reboot the server Problem resolved for next 5- 10 days(some time) and again  occurred after some time...!

I'm out of ideas.

I've asked some other experts to pop in.

Try creating a new folder on the desktop and name it:

Scheduled Tasks.{D6277990-4C6A-11CF-8D87-00AA0060F5BF}

No spaces between Sheduled Tasks, the dot, and the {

That should create a new access point to Scheduled Tasks.  It can easily be deleted without affecting anything else.

There is a command that opens the Scheduled Tasks "folder" in Windows 2000 and XP:

%SystemRoot%\explorer.exe ::{20D04FE0-3AEA-1069-A2D8-08002B30309D}\::{21EC2020-3AEA-1069-A2DD-08002B30309D}\::{D6277990-4C6A-11CF-8D87-00AA0060F5BF}

The :: separated Class Identifiers relate to the following:

My Computer = {20D04FE0-3AEA-1069-A2D8-08002B30309D}
Control Panel = {21EC2020-3AEA-1069-A2DD-08002B30309D}
Scheduled Tasks = {D6277990-4C6A-11CF-8D87-00AA0060F5BF}

So the command is really just telling Windows Explorer to access the special Scheduled Tasks "folder" via My Computer and then through Control Panel.

In previous versions of Windows eg. Win98, you could Right-Click > New > Folder, and name it for example:

Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}

and it would create a new "Control Panel" without .{21EC2020-3AEA-1069-A2DD-08002B30309D} at the end of the file name wherever you wanted to.  In Windows XP the .{21EC2020-3AEA-1069-A2DD-08002B30309D} would remain visible as a file extension, even though the new "folder" would take on the attributes of the Control Panel, but the theory is the same.  It just creates a new virtual container or access point for the Control Panel Applets to show.

In many cases these Windows "Special Folders" do not actually exist as proper folders.  They are what was referred to as "NameSpace" items and only showed in the Windows "shell" (ie. Windows Explorer) because of registry values that tell Windows where to make them show.  In other cases the special folders are actually real folders, but are given special attributes because of registry values and also because of "Desktop.ini" files in them.

The Control Panel Icons or "applets" are real files, although they do not actually reside in a folder named "Control Panel".  They reside in the Windows\System, Windows\System32, or equivalent folder, and are made to show in the Control Panel NameSpace as though they are actually inside a real folder.  Can anyone provide the full path to the "Control panel" folder?  No, because it isn't a real folder.  That is why it can exist on the Start Menu, in My Computer, and anywhere else you chose to make a copy of it.

The command that opens a Control panel Applet ie. a *.CPL file, is stored in the registry key:  

HKEY_CLASSES_ROOT\cplfile\shell\cplopen\command
"rundll32.exe shell32.dll,Control_RunDLL "%1",%*

So the actual command is:

rundll32 shell32.dll,Control_RunDLL Filename.cpl

Windows XP (and possibly also Win2000 - I can't remember) have a program "Control.exe" that makes the command much easier:

control filename.cpl

You will find a list of the CLSIDs for the "special folders" here:

http://smallvoid.com/article/windows-special-folders.html

The following page then goes on to describe the "shell:" command that allows Windows 2000 through to Vista and 2008 to open the special folders:

http://smallvoid.com/article/winnt-shell-keyword.html

The shell:: command is really just like the explorer command in that these two commands both do the same thing:

shell:ControlPanelFolder

explorer.exe ::{20D04FE0-3AEA-1069-A2D8-08002B30309D}\::{21EC2020-3AEA-1069-A2DD-08002B30309D}

Try the various methods and see if you can at least access the areas you need to go.  Sadly I am not sure where exactly your problem lies and how to fix it.

My WinTel Admin is saying that there is some issue with Application (IIS) & its process running on win 2k machine. But I dont know how to trace it...!

what apps are you running that utilize iis? Do you have exchange or backup software installed on this server?

what apps are you running that utilize iis? Do you have exchange or backup software installed on this server?

only IIS 5.0 is running for websites created in .net, there is no exchange/no backup s/w  on server

anyway now I have moved my web server to win 2k3 ,not getting problem since a long time, but still not sure like what was the reason behind it...?

if you have  any more idea about this issue please share otherwise I can close this issue..!

I am sorry, but I don't have any ideas.  My original comment was just offered to possibly provide alternative means to use the features you needed, and so was just a workaround.  As far as the deeper cause was concerned, I had no idea much further back in the question.