If Windows Genuine Advantage from Microsoft Update Website detects that your Windows is not a genuine copy, the wallpaper will turn black automatically.
Your desktop wallpaper will always return to black or stay black, and the (not genuine) watermark on the right side corner of your screen will also stay there, until you activate your copy of Windows 7.
1XSamsung DVD burner SH-S223Q/BEBN SATA
1XSamsung DVD burner SH-S223L/BEBN SATA
1XLG GGW-H20L Blu-Ray burner
4XCooler Master 120mm Blue LED SickleFlow 2000 RPM
1XBelkin UPS F6C1500TWRK) backup power supply