解决方法3: 定位原因-->删除所有报错的键值;
1. Open the %TEMP% folder (on the Start -> Run dialog box type: %TEMP% and click Enter).
2. On this folder, search for a file named "Prereq_Mgr.HP_QuickTest_Professional_9.5.log". This file is created by the
installation program and contains a list of registry keys that can potentially fail the latest setup process.
Check for any entries to that file and figure out what to do about it