Need a new laptop or desktop? Microsoft's store has great discounts in honor of March 14, aka 3/14, aka Pi Day. That's why you'll save as much as 31.4 percent off some high-quality PCs from Lenovo, Dell, HP, and other manufacturers. Here are our favorite PCs that are on deep discount today. And, since they're direct from Microsoft, these PCs are all optimized to run their best without pesky bloatware.