I am having a problem getting KB973923 to install on Windows 7 x64 RTM. Windows Update says it is installing it, but the progress bar does not move. I have waited for several hours and the update won't install. Pressing the "Stop installation" button in Windows Update doesn't do anything. I have to end the task named "atl80sp1-kb973923-x64.exe" in order for Windows Update to detect that the install failed. I had the same issue with the Release Candidate and was hoping it would be fixed in RTM. I chatted online with MS support last night (using the link in the how to obtain help section in Description of the Security Update for Microsoft Visual C++ 2005 Service Pack 1 Redistributable Package: July 28, 2009) and they will not support Windows 7 RTM yet. They directed me to this forum for assistance. Does anyone have any suggestions on how to get the update to install? Thank you.