Microsoft has told its Surface Pro 4 and Surface Book buyers it is working to release additional updates and fixes as soon as possible.

Microsoft disappointed its fans when it blamed greedy OneDrive users for its decision to cancel 'unlimited storage'. The company on Friday agreed to the disappointment and said it was "truly sorry" for seeming to blame customers for using its product.

The other group of people to whom it has expressed regret are owners of the Surface Book and Surface Pro 4.

Microsoft's Josh_F on its customer forum said, "We're sorry for any frustration this has caused."

A steady series of complaints about flickering screens, random crashing, and battery problems have knocked both pieces of hardware since launching in October.

A November update was released to fix problems affecting the flagships, only to be followed by new complaints that devices were exhausting battery reserves in sleep mode so quickly that they cannot be used as a primary work device.

Customers have been complaining about the sleep-mode, battery-drain issue since October and Microsoft doesn't expect to resolve the problem until early next year.