A recent report suggested Windows 8 may have hurt the declining global PC market rather than helped it, and new inside data points to a continued negative trend in April. According to Digitimes’ research arm, the top-5 PC vendors in the world saw their notebook shipments plummet a combined 20% sequentially in March. The site thinks overall shipments will likely fall yet again in the second quarter as a result, and Q2 shipments could be down 15% year-over-year. HP, Acer and Lenovo saw the worst April shipment plunges according to Digitimes and excess inventory is reportedly building as vendors ready their next-generation laptop models.