How to Cancel Startup Through Regedit
There are four specific registry keys responsible for administrating startup behavior in the Windows operating system. These keys are typically written to by a software application installed on your computer. A program can schedule itself to run at startup in a number of ways depending upon the parent key. You can cancel these actions by removing the values using the Windows Registry Editor.
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Instructions
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Click “Start.” Type “Regedit” in "Search" and press “Enter.”
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Go to “HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run” in the Registry Editor. This provides a list of any items on the right pane that are scheduled to run at Startup the next time you log in to Windows
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Prevent a program from running at startup by right-clicking the item and selecting “Delete.” Click “Yes” to confirm.
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Click the “RunOnce” key on the left pane. This provides any items scheduled to run at startup once for the user currently logged in. This is often used for software maintenance, virus scanners and similar applications. Right-click any items listed on the right pane and click “Delete.” Click “Yes” to confirm.
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Go to “HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run” in the Registry Editor. This provides a list of any items on the right pane that are scheduled to run at Startup the next time any user on your computer logs in to Windows.
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Prevent a program or task from running by right-clicking it on the right pane and clicking “Delete.” Click “Yes” to confirm.
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Click the “RunOnce” key on the left pane. This shows any items scheduled to run at startup once for all users on your computer. Right-click any items listed here and click “Delete.” Click “Yes” to confirm.
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