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In many cases this isn't a major deal. However, it can be frustrating if you step away from a work session and come back to a freshly rebooted system. You might also be downloading a large file or letting a lengthy operation run while away from your PC, expecting it to be finished upon return.
Fortunately there are various workarounds available. Today we will mention a few that have been tested to work in XP, Vista and Windows 7 systems.
Windows XP: Open Start > Run and enter the following command: net stop "automatic updates" OR sc stop wuauserv. You can also suspend the process with PsSuspend and the command pssuspend wuauclt.
Windows Vista/7: Open Start and search for cmd. Right click on the found program and click Run as administrator. Enter the command net stop "windows update" and you're good to go. Likewise, you can suspend the process with PsSuspend and the command pssuspend wuauclt.
For users of Professional, Ultimate and other upper-tier versions of Windows, you can adjust a few things in your group policy settings or system registry:
Windows XP: Start > Run > enter gpedit.msc. Navigate to Local Computer Policy > Computer Configuration > Administrative Templates > Windows Components > Windows Update. Double click "No auto-restart for scheduled Automatic Updates installation," then choose Enabled and click OK.
Windows Vista/7: Start > search for gpedit.msc. Navigate to Computer Configuration > Administrative Templates > Windows Components > Windows Update and enable "No auto-restart for scheduled Automatic Updates installations".
All non-Home users can apply the same policy change by adding a new key to the registry. Go to Start > Run/Search for regedit. Navigate to HKEY_LOCAL_MACHINE SOFTWARE Policies Microsoft Windows WindowsUpdate AU. Create a new 32-bit DWORD value named NoAutoRebootWithLoggedOnUsers and give it a value of 1. You can also download and double click on this registry key to add the key automatically.
Keeping your operating system up to date is vital to having a malware-free computer. But even with Windows fully patched, any of your installed applications can be a potential point of entry for attackers should you forget to grab the latest version available. Utilities such as Secunia's PSI can provide an extra layer of protection by scanning your computer for installed software, and then warning you of potentially unsafe applications that have available updates.
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