The first step: delete the registry information to open the registry editor method: click the "Start" button, click "Run", (or shortcuts windows + R) type RegEdit and then you want to delete the registry One of the items. Or you type Regedit in the registry to find the following files in the directory order, delete. The above is a description of two ways to delete an item in the registry. Listed below are the ones you want to delete (if you don't have one, you don't have to delete them): HKEY_LOCAL_MACHINE\\Software\\Microsoft\\DevstudioHKEY_LOCAL_MACHINE\\Software\\Microsoft\\HTML Help CollectionsHKEY_LOCAL_MACHINE\\Software\\Microsoft\\Visual BasicHKEY_LOCAL_MACHINE\\Software\\Microsoft\\Visual Component Manager, HKEY_LOCAL_MACHINE\\Software \\Microsoft\\Visual ModelerHKEY_LOCAL_MACHINE\\Software\\Microsoft\\VisualStudio HKEY_LOCAL_MACHINE\\Software\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\Visual Basic 6.0-OR-MSDN Library-OR-Visual Basic 6.0 componentsHKEY_CURRENT_USER\\Software\\Microsoft\\DevstudioHKEY_CURRENT_USER\\Software\\Microsoft\\Visual BasicHKEY_CURRENT_USER\\Software\\Microsoft\\Visual Component ManagerHKEY_CURRENT_USER\\Software\\Microsoft\\Visual ModelerHKEY_CURRENT_USER\\Software\\Microsoft\\Visual BasicHKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\MenuOrder\\StartMenu\\&Programs\\Microsoft Visual Basic 6.0-or_'MSDN Library-or-other Visual Basic 6.0 componentsHKEY_USERS\\S-1-5-21-2127521184-16040129 20-1887927527-72713\\Software\\Microsoft\\Visual BasicHKEY_USERS\\S-1-5-21-2127521184-1604012920-1887927527-72713\\Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\MenuOrder\\StartMenu\\&Programs\\Microsoft Visual Basic6 .0-or_MSDN Library)-or-other Visual Basic6.0 components Step 2: Delete the directory C:\\Program Files\\Microsoft Visual BasicC:\\Program Files\\Common Files\\DesignerC:\\Program Files\\Common Files\\Microsoft Shared\\ MSDesigners98C:\\Program Files\\Common Files\\Microsoft Shared\\MSDNC:\\Program Files\\Common Files\\Microsoft Shared\\TrieditC:\\Program Files\\Common Files\\Microsoft Shared\\VS98C:\\Program Files\\Common Files\\Microsoft Shared\\Wizards98 Three steps: delete the dynamic link library dll file Click “Start”, search for the following file and delete it Hh.exe, Hh.dat, Hhcolreg.dat, Hhctrl.ocx, Itss.dll, Itircl.dll fourth Step: Check the Comcat.dll file to find the Comcat.dll file in the Windows\\System or WinNT\\System32 directory. If the file size is not 22K, do the following: Windows+R, type r Egsvr32 /u comcat.dll Find the Comcat.dll file in the Windows\\System or WinNT\\System32 directory, delete it from the Visual Basic installation disk, find the \\Common\\Ide\\Ide98\\Redist \\Comcat.dll file and copy it to In the Windows\\System or WinNT\\System32 directory, click the “Start” button, click “Run”, and type regsvr32 comcat.dll. After the above four steps, the Visual Basic is completely removed from the system. Just re-install it. Experiments show that the directory C:\\Program Files\\Common Files\\Microsoft Shared\\Triedit can not be deleted, in fact, it can not be deleted, because the prompt system is being used. If you want to reinstall VB6.0, you can win7 compatibility problem, the installation is complete. After doing this, you can do it: Click on the property, and then strictly select and apply it as shown below. Your Vb will be installed successfully, but every time you open Vb6.0, your windows desktop will become a windows basic color scheme.