HCL recommends Windows® 7.
HCL recommends Windows® 7. ME Laptop 1015 · Genuine Windows® 7 Professional · Intel® 2nd Generation Pentium B940/950, Core i3/i5/i7 Processors · Intel® HM65 chipset · 15.6" HD (1366x768) LED backlit LCD display · Upgradable upto 8 GB DDR3 1333 MHz RAM · Upgradable upto 640 GB, 5400 RPM HDD · DVD Super Multi Drive · Integrated Camera 1.3 MP, WLAN & Bluetooth 3.0 · 4 in 1 card reader, 4 USB (2 USB 3.