A pair of rumors have four major Windows PC builders coming back after a hard 2011. Acer and ASUS were said by Digitimes to be both avoiding the traditional post-holiday slump. ASUS was purportedly seeing a PC shipment drop of 10 percent, or half as much as it had expected, while Acer was not only expected to match the roughly six million PCs shipped in the fall but possibly exceed the amount, up to 6.2 million.