All of you posting about black screens? some of u list cpu and ram... but did u ever stop to consider you video card much be choking trying to display multiple devices? Graphics Processor Unit = GPU. I had a gtx460 768mb vram got black screens alot, bought a 670gtx 4gig vram not a problem. Point being there is a multitude of different things a system needs especially when running into having multiple graphical environments. When 6 different "machines" try to access the same shared vram simultaneously and each are reading and writing into memory others are, would it not make sense it would cause display errors and a black screen? As in it returns a null because data conflicts with previous data at a location.
Just some food for thought, changing programs wont so much as change your problem just might bring it forward in a different direction either way, I dont think recent bans were the drive of this. I have been Using VM's with V*P*N's for a while just because its good practice when botting on a above average capacity for a single network and physical address.
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