Hotfix for Windows 7 (64-bit) – IdeaPad Z370, Z470 NameOperating SystemVersionReleasedDownloadHotfixIN1PCH34WW6.exe790 KBWindows 7 64bitKB97825814 Feb 2011DownloadSupported SystemsIdeaPad Z370, Z470Supported Operating SystemsWindows 7 64-bit