Can't install Adobe AIR on Win 7 x64

Adobe Air has NEVER installed cleanly on my Win 7 x64 system.  It always says it has installed successfully but then the next screen is

I cleaned out the AIR Install.log file and did a clean install (after having done a registry clean-up -- which actually didn't find anything to clean up).  The install failed again.  This is what is in the Install.log file -- it contains the uninstall and the install.  All I see is an error # 3001.  Any insights would be appreciated.

[2010-10-13:10:24:17] UI SWF load is complete

[2010-10-13:10:24:17] UI initialized

[2010-10-13:10:24:17] starting user confirmation

[2010-10-13:10:24:18] Version of this installer: 2.0.4.13090

[2010-10-13:10:24:18] Installed version: 2.0.4.13090

[2010-10-13:10:24:18] Installation type: patchSame

[2010-10-13:10:24:20] starting elevated install

[2010-10-13:10:24:20] UI SWF load is complete

[2010-10-13:10:24:20] starting uninstall

[2010-10-13:10:24:20] Scheduling an MSI uninstall operation for active product GUID {B194272D-1F92-46DF-99EB-8D5CE91CB4EC}

[2010-10-13:10:24:20] Beginning install

[2010-10-13:10:24:20] Uninstalling product w/ GUID {B194272D-1F92-46DF-99EB-8D5CE91CB4EC}

[2010-10-13:10:24:21] Copying C:\Users\Default\AppData\Roaming\Macromedia\Flash Player\www.macromedia.com\bin\airappinstaller to e:\TEMP\fla409F.tmp\temp

[2010-10-13:10:24:21] Deleting C:\Users\Default\AppData\Roaming\Macromedia\Flash Player\www.macromedia.com\bin\airappinstaller

[2010-10-13:10:24:21] Execution complete; beginning commit phase

[2010-10-13:10:24:21] Deleting e:\TEMP\fla409F.tmp\temp

[2010-10-13:10:24:21] Commit complete

[2010-10-13:10:24:21] install complete

[2010-10-13:10:24:21] begin quitting

[2010-10-13:10:24:22] Elevated install completed

[2010-10-13:10:24:22] begin quitting

[2010-10-13:10:25:09] Performing runtime install

[2010-10-13:10:25:09] UI SWF load is complete

[2010-10-13:10:25:09] UI initialized

[2010-10-13:10:25:09] starting user confirmation

[2010-10-13:10:25:09] Version of this installer: 2.0.4.13090

[2010-10-13:10:25:09] Installation type: new

[2010-10-13:10:25:12] starting elevated install

[2010-10-13:10:25:12] performing an elevated runtime install

[2010-10-13:10:25:12] UI SWF load is complete

[2010-10-13:10:25:12] starting install

[2010-10-13:10:25:12] Scheduling runtime installation operations

[2010-10-13:10:25:12] Scheduling an MSI install operation

[2010-10-13:10:25:12] Beginning runtime installation

[2010-10-13:10:25:12] Beginning install

[2010-10-13:10:25:12] Installing e:\temp\airf213.tmp\setup.msi

[2010-10-13:10:25:13] Copying E:\temp\airf213.tmp\Adobe AIR\Versions\1.0\Resources\airappinstaller.exe to C:\Users\Default\AppData\Roaming\Macromedia\Flash Player\www.macromedia.com\bin\airappinstaller\airappinstaller.exe

[2010-10-13:10:25:13] Copying E:\temp\airf213.tmp\Adobe AIR\Versions\1.0\Resources\digest.s to C:\Users\Default\AppData\Roaming\Macromedia\Flash Player\www.macromedia.com\bin\airappinstaller\digest.s

[2010-10-13:10:25:13] Execution complete; beginning commit phase

[2010-10-13:10:25:13] Commit complete

[2010-10-13:10:25:13] install complete

[2010-10-13:10:25:13] begin quitting

[2010-10-13:10:25:13] Elevated install completed

[2010-10-13:10:25:17] Elevated install failed (3001)

[2010-10-13:10:25:17] runtime install entering error state: [ErrorEvent type="error" bubbles=false cancelable=false eventPhase=2 text="Error #3001" errorID=3001]

[2010-10-13:10:25:18] begin quitting