Because I am developing for Android, however, I have to install the ADT Plugin within Eclipse by going to Help Install new software (or something to that effect).
I checked all handles (processes) using 'eclipse.exe' and there 'eclipse.exe' itself, 'java.exe' and 'csrss.exe' (Client/Server Runtime Subsystem from Windows, its used for the console and threading under Windows).
I found a bugreport https://bugs.eclipse.org/bugs/show_bug.cgi? id=333355 with the same issue but no solution for my case.
Available update sites for sts are listed here: https://spring.io/tools/sts/all.
An error occurred while uninstalling session context was:(profile=epp.package.standard, phase=org.eclipse.equinox.internal.p2.engine.phases. Backup of file E:\Program Files (x86)\eclipse\failed. Can not remove : E:\Program Files (x86)\eclipse\The eclipse update feature seems to mess up a lot of times with broken dependencies and missing configurations.
Uninstall, operand=[R]org.ide.executable.win32.win32.x86_64 4.3.0. I20130314-1330 -- null, action=org.eclipse.equinox.internal.p2.touchpoint.natives.actions. XXMax Perm Size 256m --launcher.default Action open File -vmargs -XX: Unlock Experimental VMOptions -Xms128m -Xmx1024m Running Win7 64Bit with 64Bit JDK7u21 as administrator and i'm using updatesite "
My anti-virus has an exception for my hole eclipse folder.
I strongly recommend you to go through previous articles and download the source code of our sample application.
I install Eclipse from the Software Center so it links up and will be updated with the rest of my software.
Removing from the "Available Software Sites" in Eclipse, and adding it again did the fix. After exporting and importing bookmarks, the problem did not get resolved. On further thoughts I found that my antivirus is not allowing eclipse to talk to internet. Sandeep Jindal I had a similar problem over the last couple months, but ignored it until I really needed Py Dev to work on my laptop today.
I tried the solutions above to no avail and then I found something odd: In (Window-Available Software) I noticed that the box for 'Py Dev Update Site' AND another one right below it with the location 'file:/updates' were both checked, causing a duplicate of most or all update URLs.
Ubuntu 12.04 and Eclipse 3.7.2-1 I just tried uninstalling Eclipse and then reinstalling it, running it as root first to have the plugins associated with the root account, so I could update them from there.