Well I've checked my USB drivers and they're all up to date so I doubt it's the drivers themselves. Honestly I'm believing that it's the power flow between the laptop and the tablet itself which is odd but it's the only thing that I can possibly think of.
Your computer can only kick out so much power through its USB ports. If you have a lot of USB devices plugged in (or just a few power hungry devices) then some stuff will start failing due to lack of power. And will stop and start working depending on the power consumption of other devices.
You didn't say much about your system so it is hard to be exact about what the problem is - but when you say a USB device is randomly losing and regaining power I know what I'm thinking.
It might be worth trying your tablet without other USB devices attached. If that helps then a USB hub with independent power supply would be the solution.
Well I used a HP Pavilion dv6 Notebook PC with windows 7 64-bit, 6gb of Ram and 2.30GHz processor.
Even though I have no intense knowledge bout computer specs, I'm sure that my laptop should be more than enough to handle this the tablet and vice-versa. Also, the only other USB plug in I use is a IBM mouse and I've even tried unplugging it once solely for the tablet and even that wasn't working like it should.
If you only have the intuos and the mouse plugged in then that shouldn't be the problem. On the other hand an Intuos might be a significant power draw on its own for a notebook operating on battery power. Does this happen when the notebook is plugged in?
The HP website suggests downloading a 'hotfix' for its computers when encountering USB problems under Windows 7 - [link]
The laptop is constantly plugged in yes and this issue still occurs. I've also tried a hotfix that identified if the USB drivers were up to date, which they were. Even right now, I am currently searching for possible USB drivers that are more updated, if that is the issue. But I'm still clueless as to what the issue can possibly be.