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You need to turn off system resotre that is why you are having those problem's getting rid of the pests, here is how in ME
WinME.
Click Start > Settings > Control Panel.
Double-click the System icon.
If the System icon is not visible, click View all Control Panel options to display it.
On the Performance tab, click File System.
On the Troubleshooting tab check Disable System Restore.
Click OK. Click Yes, when you are prompted to restart Windows.