Quote:
Originally Posted by macnab69
My change from 32bit to 64bit was at least 6 months ago. None of the attempts to fix this problem had any effect. Even with both 32bit and 64bit installed, 32bit was working and 64bit wasn't.
It was only by deleting the 64bit install folder and re-installing that the problem was solved. (I normally use Revo Uninstaller and calibre 64bit doesn't appear there. It appears in Windows uninstall list, as well as CCleaner's, but not Revo!? The 32bit version does.)
It can't be anything to do with the settings files, because both versions share them. It can only be a file in the 64bit folder that didn't change with the upgrade from 1.4 to 1.5. Probably a glitch in ebook-viewer.exe.
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I used to a Revo fan but I had problems with it when 7 was released, so it fell out of favour. To get it to see 64bit programs I think you have to buy the Pro version.
You're right, these problems have nothing to do with the settings files, nor with firewalls or antivirus.
When you had 32bit, before 64 bit was released, did you set up any Windows associations of any file types (e.g. epub, mobi etc) with the ebook-viewer program - which was at
C:\Program Files (X86)\Calibre2\ebook-viewer.exe
Did you change the associations to
C:\Program Files\Calibre2\ebook-viewer.exe before you uninstalled the 32 bit version. If you didn't then the file associations were still in the registry, and they were referring to something that no longer existed. This results in not being able to read epubs from Windows Explorer and not being able to correct the association because of a deficiency in Windows.
The solution is to clear the registry of all references to
C:\Program Files (X86)\Calibre2\ebook-viewer.exe. I know CCleaner will do it cleanly, so that new associations can be set up for
C:\Program Files\Calibre2\ebook-viewer.exe. Maybe there is some chain of events that occur when fixing this problem manually or via some tool other than CCleaner that somehow leads to this permissions issue manifesting sometime later.
Maybe the uninstall could be furnished with a warning
"Have you removed any Windows file associations you created for the ebook viewer program. If you haven't please select Cancel - and read this in the manual http :// manual.calibre-ebook.com / blah blah"
I see that programs that are installed via an .msi don't have an uninstall.exe, so...
Did you ever uninstall the 32bit version with Revo - I think its come up on a couple of other threads relating to these Windows file system issues ???
BR