Lenovo H535 Desktop Win 8.1 USB 3.0 Disconnecting Issue

Question

OK. I just bought this Lenovo H535 desktop in early September and this OS has been driving me CRAZY.  After spending well over a month and performing maybe 7 clean installations, I'm trying to get this stupid & worthless operating system to work correctly, I'm left with one issue(that I know of) I cannot resolve.
Now that I've upgraded Win 8.1 core (clean install from RTM iso), my USB 3.0 external Fantom Greendrive is disconnecting on it's own. In Windows 8, it stays connected FOR EVER, but in Windows 8.1, I'm having issues. Of course the drive is plugged into the back of the PC and I've tried each of the USB 3.0 ports. One thing I can tell you is, this USB 3.0 device disconnects at the same exact time each time..... NOT RANDOMLY. Disconnects that the same time provided I don't change any of the PC's hardware settings. And I'm now troubleshooting this isse on a freshly installed system:
Normally the Fantom HD disconnects in 7 min 15 sec.  I have tried:
Disabling the USB Selective Suspend  in the Power Options -  Doesn't work.  USB 3.0 disconnects in 7 min 15 sec.
Also disabled the HD from sleeping also in the same panel.- Doesn't work.  USB 3.0 disconnects in 7 min 15 sec..
Regardless of what I'm doing on the computer in the background, it always disconnects at the same exact time.
Tried disabling the Power service all together(no power options.) - USB 3.0 disconnects in 22 min 45 sec.
I turn Power Service back on and disabled about 10 uneeded  services - USB 3.0 disconnects in 7 min 15 sec..
OK, after installing ANOTHER fresh install of Win 8.1, and installing the Windows Updates, BUT this time I have installed ALL updated device drivers from the Lenovo support site for Win 8.1  Even though most devices were running ok with MS generic drivers.   I thought that the installation of a new Chipset Driver and USB Filter Driver would fix the issue. Nope. I GET THE SAME DARN DISCONNECTING.
Conclusion. In Windows 8 Core, the USB 3.0 external Fantom HD stays connected for EVER  but in Win 8.1 core- it's disconnecting. That leads me to believe that Windows 8.1 core has some bugs. With my limited experience, it seems that there is NOT physical power shortage. but a Windows 8.1 bug. (works good in windows 8) Another thing that may be related is with Win 8.1, the PC will not go to sleep. Sleeping issues is defitely a bug
Everyone on most sites I've read said to install the chipset drivers and it will work fine. Well, with me, everything is the exception.
Can the Fantom HD disonnecting on it's own all the time, corrupt anything on it?
Does anyone have any resolve or any additional info on this????  I really would appreciate it. I kind of like Win 8.1 better than 8 because it's the lesser of 2 evils.  Oh, I'm glad to a member in the forum

Answer 1

Hello again.  I found the solution!! Simplly clean installing Windows 7pro  and getting rid of Windows 8 did the trick. the USB 3.0 hard drive stays connected as long as I like. The 3.0 speeds are great also.  It's a shame I bought Windows 8 on a pre-installed system, but I'm never gonna use it. I like the fact that Lenovo provided the Windows 7 Drivers on the support website for my H535 which gave me the opportunity to install OEM and AMD drivers as opposed to microsoft generic drivers.
Now I need to find a product key. I don't know where to look or if any product key work work. Would buying a Retail box work? Seems like overkill just for a key. Can I buy a downloadable product product key for a cheaper price? Thanks
To add: I found out that the Windows 7 pro x64 retail boxes (DVD, COA, KEY) are about $130-$140.  I don't think I want to buy a key without the COA which is proof that your key is authentic.