Slow performance with USB device disconnected

I have a T61 Lenovo Thinkpad running XP Pro SP3. I have a Belkin USB hub connected to one of the USB ports and on the hub I have just one device - a Logitech Wireless keyboard and mouse. I also have a Lacie external hard drive connected to another USB port but not via the hub.

If I disconnect the hub (i.e the keyboard and mouse), or the external HDD, the laptop performance gets very bad. In task manager CPU usage goes to 100% but it is difficult to see which process or procceses are causing the issue. If I reconnect the USB device performance improves.

Even if I disconnect the USB devices and reboot, CPU usage is still 100%. To me it seems that something is still trying to access the USB devices that are missing. If it was just the HDD I could suspect a scanner of some sort (McAfee or SpyBot) but I'm confused by the wireless keybord/mouse.

Any iodeas? Thanks.

Hello,

This is really difficult to troubleshoot. We have to this this step by step using a clean boot procedure.


Step 1: Start the System Configuration Utility

1. Click Start, click Run, type msconfig, and then click OK.
2. The System Configuration Utility dialog box is displayed.

Step 2: Configure selective startup options

1. In the System Configuration Utility dialog box, click the General tab, and then click Selective Startup.
2. Click to clear the Process SYSTEM.INI File check box.
3. Click to clear the Process WIN.INI File check box.
4. Click to clear the Load Startup Items check box. Verify that Load System Services and Use Original BOOT.INI are checked.
5. Click the Services tab.
6. Click to select the Hide All Microsoft Services check box.
7. Click Disable All, and then click OK.
8. When you are prompted, click Restart to restart the computer.

Step 3: Log on to Windows

1. If you are prompted, log on to Windows.
2. When you receive the following message, click to select the Don't show this message or launch the System Configuration Utility when Windows start check box, and then click OK.

Note:
* You have used the System Configuration Utility to make changes to the way Windows starts.
* The System Configuration Utility is currently in Diagnostic or Selective Startup mode, causing this message to be displayed and the utility to run every time Windows starts.
* Choose the Normal Startup mode on the General tab to start Windows normally and undo the changes you made using the System Configuration Utility.


Step 4: Optional step to disable features

If the clean boot fixed the error, you do not have to perform this step.

Important If your problem is not fixed and you do have to follow this step, it permanently removes all restore points from your computer. The System Restore feature uses restore points to restore your computer to an earlier state. If you remove the restore points, you can no longer restore Windows to an earlier state.

This step temporarily disables Microsoft features such as Plug and Play, networking, event logging, and error reporting.

1. Click Start, click Run, type msconfig, and then click OK.
The System Configuration Utility dialog box is displayed.
2. Click the General tab, click to clear the Load System Services check box, and then click OK.
3. When you are prompted, click Restart to restart the computer.

If these steps helped you start your computer in a clean-boot state, you are finished. If these steps did not help, go to the “Next Steps” section. If you have to return your computer to a normal startup state, go to “Steps to configure Windows to use a Normal startup state”.
Steps to configure Windows to use a Normal startup state
After you used the clean boot to resolve your problem, you can follow these steps to configure Windows XP to start normally.

1. Click Start, and then click Run.
2. Type msconfig, and then click OK.
The System Configuration Utility dialog box is displayed.
3. Click the General tab, click Normal Startup - load all device drivers and services, and then click OK.
4. When you are prompted, click Restart to restart the computer.

Thanks for this. I will try later this week and report back.