I was reading a bunch of reviews and as I suspected there are a lot of bad reviews of the Roland A-300 Midi Controller and Windows 10. Apparently the drivers on the midi controller are incompatible.
 
OK, Does anyone know of a midi controller that works with Sonar Platinum and Windows 10 without any issues?

I spoke with Sweetwater but the rep said he wasn't aware of any midi controller by Roland 

bayoubill
I spoke with Sweetwater but the rep said he wasn't aware of any midi controller by Roland 

I have visited VW service yesterday and the "master" sad "wow... that I have not seen before!"
It happened that is also know nothing about many other things...
 
https://www.roland.com/global/support/by_product/a-300pro/updates_drivers/
So at least drivers exist for Windows 10 (there was a period when there was no drivers for almost all Roland devices, unfortunately not all devices got love, but this controller was "lucky").

WOW! You've made up my mind. THANKS!

Not sure where you heard Roland has not had drivers??. Roland has a lot of stuff and even for old old equipment. 
Glad I saw this as I realised I never checked for a W 10 driver for my A 49. Seems to run fine, but then looking on the support page it does say W10 will automatically download the driver, so I'll check the version... If I can find it. 

Cactus Music
Not sure where you heard Roland has not had drivers??. Roland has a lot of stuff and even for old old equipment.

What about all VS-700 (VS-20, and other Roland) threads? 
 
Roland was a bit late with Win10 drivers, they was added after Win10 initial release. The problem is that Roland "lock" all there drivers to particular Windows releases (something other companied are/was not doing). So it is impossible to install f.e. Win8.1 driver on Win10 without tricks, even if technically speaking it is working.
 
Roland has made a lot of "friends" with that. Not supporting some not so old devices was pure political decision. Technically most Roland drivers are the same (Edirol... in Linux kernel all of them are supported by the same code, control panel for my VS-20 looks EXACTLY the same as for my TD-11). But some was labeled as "Win10 compatible", other not.
 
Roland is not alone... some not so old M-Audio interfaces was declired Win10 incompatible (as with Roland, also correlated with corporate changes of ownership).
 
For A-Pro there was several threads about problems before, if I remember correctly even before Win10. But then new drivers was released and the Internel keep silence (means everything is working fine now).

OK, I've read a lot of complaints about the "quality" of Roland drivers, they seem to be pretty low end.   But bad or good they do seem to put them up on the support site so that's what I guess I was saying. I'll agree they certainly are blowing it lately. They used to be a leader in producing high quality Midi sound sources and keyboards.
Everything was always way over priced too. But all my Roland gear still works. I have a digital delay from the 80's and the Manual is still on their website. 
 

I think Roland may have gotten dinged for some of their audio interfaces, but so far I have seen no bugs with the MIDI controller A-300 Pro.
 
This controller is plug n play with Windows 10.  The driver is installed automatically by Windows.
https://www.roland.com/us/support/by_product/a-300pro/updates_drivers/703e59c5-65de-492a-993f-33726f044a6c/

I downloaded the file but not reading the file. I still haven't gotten the part to fix my DAW which has windows 10. Hopefully it will come today. I've been without that DAW way longer than I should have considering it's brand new

I'm pretty happy with the A49 it always works and was the best "feel" in that price range. 
The one before was A Roland PC 200 from 1989. I wore out the C2 & D2 key :)