Unity crashes before opening

Unity crashes before opening, always.
I’ve seen that several other people have/had similar problem, but nothing I have tried has caused any change.
Perhaps I can get some help?

If this is happening on other projects too, uninstall and re-install

I have tried reinstalling Unity, updating Unity, updating drivers, checking service packs, checking anti-virus software…

I’ve tried reinstalling Hearthstone, the main reason I’ve been bothered by Unity not working.
I posted on their forums just in case, but I believe it is a Unity problem as neither web games using Unity, nor Unity itself seem to work.