File Previewers not working in Explorer

Delete these reg entries

Microsoft Excel previewer:

HKLM\SOFTWARE\Classes\CLSID{00020827-0000-0000-C000-000000000046}

Microsoft PowerPoint previewer:

HKLM\SOFTWARE\Classes\CLSID{65235197-874B-4A07-BDC5-E65EA825B718}

Microsoft Word previewer:

HKLM\SOFTWARE\Classes\CLSID{84F66100-FF7C-4fb4-B0C0-02CD7FB668FE}

Microsoft Visio previewer:

HKLM\SOFTWARE\Classes\CLSID{21E17C2F-AD3A-4b89-841F-09CFE02D16B7}

Then do a quick repair of office and it should be good to go.

Oh well, I thought I had it figured out, it seemed that this happened right after I installed Adobe Reader 9.2.

Apparently that wasn't it.  Restoring to an earlier "Restore Point" was no help.

I ended up reinstalling the OS - a real PITA, and a two-hour long or more process, compared to XP.

I still can't imagine why a reinstall took so long since the original "upgrade" from XP only took 20-25 minutes.

Afterwards, I created another Restore Point and reinstalled Adobe Reader, this time there were no issues.

Bottom line, I have no idea what caused this, and so it seems, neither does anyone else...

I'm a little disappointed that MS only responded with a canned reply, and a little surprised that I had to do a complete reinstall of the OS so soon after having installed it in the first place.

This is not a good sign...

J_Mack

Hi,    

Welcome to Microsoft Windows 7 Answers Forum! 

We would like to get more information from you, to help troubleshoot your issue. Please answer the following questions as best you can.

a)      When was the last time it was working?

b)       Do you remember making any changes to the computer recently?

Now perform SFC scan on your computer and check for the issue:

1. Click the Start button
2. From the Start Menu, Click All programs followed by Accessories
3. In the Accessories menu, Right Click on the Command Prompt option
4. From the drop down menu that appears, Click on the 'Run as administrator' option
5. If you have the User Account Control (UAC) enabled, you will be asked for authorization prior to the command prompt opening. You may simply need to press the Continue button if you are the administrator or insert the administrator password etc.
6. In the Command Prompt window, type: sfc /scannow and then press Enter
7. A message will appear stating that 'The system scan will begin'
8. Be patient because the scan may take some time
9. If any files require replacing SFC will replace them. You may be asked to insert your Vista DVD for this process to continue
10. If everything is okay you should, after the scan, see the following message "Windows resource protection did not find any integrity violations"
11. After the scan has completed, close the command prompt window, restart the computer and check.

Thanks and Regards:

Suresh Kumar- Microsoft Support.

Visit our Microsoft Answers Feedback Forum http://social.answers.microsoft.com/Forums/en-US/answersfeedback/threads/  and let us know what you think

Anybody?

J_Mack