+++ This bug was initially created as a clone of Bug #5170 +++ E: dpkg was interrupted, you must manually run 'dpkg --configure -a' to correct the problem. E: _cache->open() failed, please report.
Hello, This is totally unrelated to Xfce, please file a bug with whatever dpkg-using distribution you're using. But for the part about having to be a super user, try looking up sudo.
Yes...