Upgrading SQL Server 2008 to SP1 should not require a blog post. Any upgrade should be a matter of clicking Next, Next, Next, Finish; but alas, SQL Server SP1 update thinks otherwise. This is what I’ve been getting when trying to run the SP1 update for an x64 instance from the network:

In order to fix this error, I followed these steps:

1. Copied the SQLServer2008SP1-KB968369-x64-ENU.exe file to my documents folder
2. Open an administrator command prompt
3. Change dir to “My Documents” folder
4. Extract the files by typing “SQLServer2008SP1-KB968369-x64-ENU.exe /extract”
5. You will be prompted to select a folder to extract, I selected C:\SQL-2008-SP1
6. Launch the file Setup.exe as administrator from the folder you specified in the previous step
7. No more “Invoke or BeginInvoke cannot be called on a control until the window handle has been created” errors.