Advanced SystemCare PRO 4 for
Microsoft® Windows® 7 (32-bit and 64-bit) Starter/ Home Basic/Home Premium/Professional/Ultimate
Microsoft® Windows® Vista (32-bit and 64-bit) Starter/Home Basic/Home Premium/Business /Ultimate
Microsoft® Windows® XP (32-bit and 64-bit) with SP2/SP3 or Home/Professional/Media Center
Microsoft® Windows® 2000