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A Revit Architecture 2010 and Windows 7 Issue
So far, most Autodesk® Revit® Architecture 2010 users who have upgraded to Windows 7 have not had any problems. I went ahead and upgraded to this new Microsoft operating system a couple of months ago despite the fact that Autodesk had stated that Revit Architecture 2010 has not been tested in the Windows 7 environment. However, I encountered a problem which I immediately reported to Autodesk support group. They then sent me an interim fix as their Development group is still working to resolve the issue. Here is that issue:

One of the biggest advantages of the annual paid subscription is that you get the latest Revit upgrades. I purchased a subscription and downloaded the latest upgrades that added a lot of functionality to Revit Architecture 2010. But after a few days, I experienced problems when I tried renaming, moving, copying and deleting Revit files. The progress dialog box that comes up when you try do any of these common functions seem to just stay there forever. The result was you cannot rename, move, copy and delete any Revit file. As a subscriber, you get free technical support for the upgrades and so after I sent Autodesk an email to report this issue, I got a quick response the following day. Here is the full text of their response: 
Hello Michael,
Thank you for choosing Autodesk Support.I understand after installing the Revit Extensions for Autodesk Revit Architecture 2010 (revitextensionsrac2010_q3.exe) included in the Subscription Advantage Pack, you are unable to rename, move, copy, or delete Revit files on your Windows 7 system.
Note: Revit Architecture 2010 has not been tested for use with Windows 7, for more information on Revit 2010 support on Windows 7 see the following document:Windows 7 support for Revit 2010 products and previous versions
The issue you are describing appears to be related to thumbnail previews in Windows Explorer. If you have Windows Explorer set to show thumbnails for files, I would suggest changing the view to details and see if the same issue occurs. (For information on changing the view in Windows Explorer, see the Windows help).
If the issue continues after turning off thumbnail preview, go through the following steps:
  1. Go to Control Panel.
  2. Open the Performance Information and Tools Control Panel.
  3. On the Visual Effects tab, click Custom.
  4. Verify "Show preview and filters in folder" and "Turn on thumbnails instead of icons" are unchecked.
  5. Click OK, and restart.
I would appreciate it if you would let me know if the steps above fix the issue. If they don't, please reply with full details of any success found, as well as the results of each step.
I’m happy to report that the problem went away after following these instructions. The drawback is you cannot see previews of images when files are set to thumbnail views. Oh well, version 2011 is coming up in April and I’m sure this issue would have been fixed by then!