Hi RichieZH,
You couldn't open the VS IDE, am I right? Do you mean that you also couldn't uninstall it from the Control panel?
>>But recently both of them can not work.
Do you mean that it woked well before? If so, do you install any extension tools/add-ins in your VS or window Environment?
(1) Run the VS in safe mode, at least, we could know that whether it is related to the add-in.
https://msdn.microsoft.com/en-us/library/ms241278.aspx
(2) Run your VS as the admin.
(3) Please also install the latest update package for your VS, like the VS2012 update 4, the VS2013 update 5.
Note: We often install different VS versions from the old version to the new version one by one.
(4) Please also run them as the admin, test it again.
If still no help, maybe you could uninstall them in command line with/force when you couldn't uninstall them in Control Panle or re-run the setup file.
https://support.microsoft.com/en-us/kb/2771441#Force
And then re-install the VS IDEs.
Best Regards,
Jack
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