Delete Feature Sharepoint 2007 / 2010

If you've a problem with feature on sharepoint, try this for delete it :

Identify problem :
Use WssAnalyzeFeatures.exe http://archive.msdn.microsoft.com/WssAnalyzeFeatures/Release/ProjectReleases.aspx?ReleaseId=886

Delete :
Use Stsadm :

C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\BIN>stsadm -help uninstallfeature
stsadm.exe -o uninstallfeature
{-filename <relative path to Feature.xml> |
-name <feature folder> |
-id <feature Id>}
[-force]
C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\BIN>stsadm -o uninstallfeature -id bbe9def7-2fe9-a0b1-d712-aa128c837ebe

C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\BIN>stsadm -help deactivatefeature
stsadm.exe -o deactivatefeature
{-filename <relative path to Feature.xml> |
-name <feature folder> |
-id <feature Id>}
[-url <url>]
[-force]
C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\BIN>STSADM -o deactivatefeature -id bbe9def7-2fe9-a0b1-d712-aa128c837ebe

or

C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\BIN>STSADM -o deactivatefeature -id bbe9def7-2fe9-a0b1-d712-aa128c837ebe -force

If you've always error, you can use :
WssRemoveFeatureFromSite -scope (site|sitecollection) -url <url-to-site> -featureid <featureid> -force
http://archive.msdn.microsoft.com/WssRemoveFeatureFrom/Release/ProjectReleases.aspx?ReleaseId=887