Quote:
	
	
		
			
				
					Originally Posted by  randomguy631
					 
				 
				sorry windows 7 64 bit home version... 
			
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 What is interesting is that it says a Newer version is installed. 8.69 is the current. check you MSI filename 

It is possible, you have corruption in your registry see 
http://manual.calibre-ebook.com/faq.html#id53
When Calibre installs, it creates a User configuration that survives un-installs (you don't lose settings or Library locations that way and different users could have different settings).
You do need Admin rights to install Calibre.
Go to Add/remove programs and Uninstall any Calibre found there.
then go to 
	Code:
	C:\Users\<your user ID>\Roaming
 And delete the calibre folder < this is all the settings and Calibre plugins you have ever installed. They will be Gone
(I would try all the solutions in the FAQ before resorting to the rest)
now 
Go to 
	Code:
	C:\Program files(x86)\
  and delete the Calibre2 folder << It is important that you uninstall before deleting
 or the registry will still think you have Calibre