To install MDAC in Windows XP SP3, perform the following steps: C:/Windows/INF, locate MDAC. inf, right-click and choose> install. In the pop-up prompt, select C:/Windows/servicepackfiles/i386, and then enter CD when you need xp cd. PS: If there is no xp cd, you can manually operate it, find the required file by using the following method: MDAC 2.8 can be installed without the XP installation disk. When you right-click to install MDAC. inf and prompt what file is needed, you can tell the file the accurate path location. Each file must be manually step by step. Adcjavas. INC, Handler. reg, mdacrdme.htm, oledbjvs. INC, mssoap1.dll, mssoapr. these six DLL files are all concentrated in the subfolders under C:/program files/common files. It is best to use the search function. The mdacrdme.htm file cannot be found. I directly created a blank mdacrdme.htm file in common files, and then selected and installed it to solve the problem.