Very solid, holds what is promised and facilitates work on the PC noticeably!

If the mouse can not connect upright keep permanet and Qype.
So the road looks to me under Win 8.1 Pro 64bit from:
1. Control Panel,
2.Geräte and printer (in the "Microsoft Sculpt Comfort Mouse" double)
3. Open the "Hardware" tab,
4. There in the "Device configuration" to the last entry (Microsoft hardware Blurtooth device) Click
5. In the window that opens "Properties" under the "General" tab "change settings" button,
6. In the window that opens, then "Power Management" the tick with "computer to turn off to save power the unit" remove.

DONE!