I have been working w/somone from microsoft to resolve this issue and it seems like this is a common problem when uninstalling OneCare. It seems that it sometimes corrupts the update folder when it uninstalls. The best way to avoid this is to install their uninstaller specifically designed to uninstall it which can be found at this link:http://forums.microsoft.com/WindowsOneCare...10&SiteID=2
If that doesn't work you'll need to rename your update folder which should solve the problem. Here are the instructions as emailed to me:
Step 1: Safe Mode
Safe Mode loads the system with the minimum amount of programs and devices.
1. Restart the computer.
2. Keep pressing the F8 key until the Windows Startup menu appears.
3. Choose Safe Mode, and press Enter.
4. Run the computer in Safe Mode.
Note: In Safe Mode, your system display and Desktop will look and perform differently than in Normal Mode. This is only temporary. To return to Normal Mode, we can simply restart the computer.
Note: If after keeping pressing F8, nothing happens. It is because the settings have been changed by the computer manufacturer. Please refer to the user manual or contact the computer manufacturer for the information how to enter Safe Mode.
Step 2: Rename the SoftwareDistribution folder
This problem may occur if the Windows Update, Software distribution folder has been corrupted. We can refer to the following steps to rename this folder. Please note that the folder will be re-created the next time we visit the Windows Update site.
1. Click Start, click Run, and type "cmd" (without the quotes) and press Enter. Please run the following command in the opened window to stop the Automatic Updates service.
Type in "net stop WuAuServ" (without the quotes) and press Enter.
Note: Please look at the cmd window and make sure it says that it was successfully stopped before we try to rename the folder. However, if it failed, please let me know before performing any further steps and include any error messages you may have received when it failed.
2. Click Start, click Run, and type in "%windir%" (without the quotes) and press Enter.
3. In the opened folder, look for the folder named "SoftwareDistribution".
4. Right-click on the folder, select Rename and type "SDold" (without the quotes) to rename this folder.
5. Click Start, click Run, and type "cmd" (without the quotes) and press Enter.
Type the command "net start WuAuServ" (without the quotes) in the opened window to restart the Automatic Updates service.
Note: Please look at the cmd window and make sure it says that it was successfully started. However, if it failed, please let me know before performing any further steps and include any error messages you may have received when it failed.
Step 3: Rename CatRoot2 folder
1. Close all the open windows.
2. Click Start, click Run, type: %windir% and press Enter.
3. Locate and open the System32 folder.
4. Find the CatRoot2 folder, right-click on it, and select RENAME. Change the name to CR2OLD. Make sure you press Enter after typing in the new name, so the changes are executed.
After that, please boot in Normal Mode to check whether our issue persists.
I hope this helps anyone experiencing a similar problem.