Windows Live Messenger Error 81000490

Here is a great post on how to resolve an error in Windows Live Messenger when it suddenly stops signing in. Delete the C:\users\<username>\AppData\Local\Microsoft\Windows Live\Contacts\<Windows Live ID> folder and then try signing in again.

HOWTO: Windows 7 SP1 Error during installation: “Service Pack Installation failed with error code 0x800f081f”

                When I attempt to install Windows 7 SP1 on multiple machines, I began the installation process as shown below. with the standalone and windows update version of the SP. It soon returns with this error: The troubleshooting page walks users through updating their anti-virus programs to update the mpfilter file.  This wasn’t my issue….