Technical Issue with my abilities

[Prootzy]

I have tried to start three seperate characters that all end up with the same problem very shortly after.

I will be playing normally and suddenly my regular attacking abilities at starting levels will just, stop working. I will be targeting an enemy from proper range.

Invalid Target

This has happened with a Rogue, Hunter, and now a Shaman.

Not really sure what I'm doing wrong here, I would try and re target, try it against something else entirely, nothing. Any ideas of what is happening?

[Shred]

Real​​​​​​m?

[Prootzy]

Its Icecrown

[MrVeixel]

Same thing is happening with me, but only in arenas, and the bug appears randomly every once a while thus making us lose because of a bug
Some abilities work but most of the damaging abilities dont work..

[dolcokidol]

Hit alt key once.
Wow sometimes bugs up if you alt tab, and registers alt as always holding.

[MrVeixel]

Hit alt key once.
Wow sometimes bugs up if you alt tab, and registers alt as always holding.

Thanks! I'll give it a try.