These steps will force booting into “Safe Mode”
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1. Start Button
2. msconfig => loads System Configuration Window
3. Boot (tab)
4. Check Safe Boot/Minimal
5. Restart

After using Safe Mode return and clear the Safe Boot/Minimal checkbox.

When using Windows Explorer the .xml file type extension is associated with an icon that helps identify and differentiate the file type. By default however, neither Vista nor IIS 7 knows anything about the .rss file type. Since .rss is a type of XML file it would be useful to associate .rss files with the .xml file type icon and register the .rss extension as a MIME Type known to IIS 7. Let's use the command line...

Associate the .rss extension with the XML file type:
c:\windows\system32>
assoc .rss=xmlfile

Create the MIME Type:
c:\windows\system32\inetsrv>
appcmd set config /section:staticContent /+[fileExtension='.rss' .mimeType='text/xml']