That is an awful lot of strange issues/requirements. I guess I was fortunate to not have changed USB ports while writing my review of the mouse.
Actually that's not all of it...Here's the entire "solution"
Randall B, Mar 11 11:56 am (CDT):
Please take the following steps
1. Refer to the picture in the link below and make sure that you are not plugged in to any of these places. The USB 3.0 port is OK to use but try using both a 3.0 port and 2.0 port. Since 3.0 provides more power, it may be the better alternative.
http://cdn.steelseries.com/userguides/Support/AVOID_USING_THESE_USB_CONNECTIONS.jpg
NOTE: If you do plan to change ports, first uninstall the SteelSeries Engine with the devices plugged into their original ports that you had them plugged into during installation.
2. Make sure that your USB devices are set to be powered up at all times and that any power saving features are turned off.
Please refer to this thread for further information (steps 1 & 2 apply for all Windows OS, step 3 is ONLY for windows 7 users):
http://windows7themes.net/mouse-not-working-after-hibernation.html
3. Kill the SteelSeries engine process (steps below)
a) ctrl-alt-del -> processes tab
b) Find SteelSeriesEngine.exe and select 'end process'
4. Download the latest 'SteelSeries Firmware Update tool' from our website at:
http://www.steelseries.com/downloads
Select your product and download the Firmware Update tool
If this does not help, please try another computer for the firmware upgrade. Please connect the device to a different Windows machine (or if you use bootcamp on Mac OSX for Windows do that), download SSE from:
Http://www.steelseries.com/downloads
Allow the firmware update to run. Once completed, you can use your device as usual.
Finally, there is one last way to possibly repair your mouse. Disconnect the mouse, and reconnect the mouse while holding the following buttons: left click, right click, and the CPI button. Wait a few seconds, and let go of the buttons. Your mouse should enter a "bootloader mode", indicated by a blinking light.
You may have to do this a few times - the first couple of times you may get the "USB Device not recognized" error message. However, it will work eventually. After it succeeds, launch the SteelSeries Firmware Repair Tool (you can find it by right clicking the System Tray icon in the bottom right corner) and perform a firmware upgrade.
Regards,
Randall B
SteelSeries Support
I NEVER had a problem with my Logitech MX500, it still works! I'm going to get my money back after a few more solutions.
The Sensei works as a general mouse w/out the software currently, but the SSEngine is used to customize its features etc