Be very careful if you want to use a registry cleaner if you have products like AutoCAD, AutoCAD Architecture or the like installed. These programs are quite sensitive to the problems that some registry cleaners create for them. It can lead to that some functions no longer works or even that you cannot start the application. Sometimes you can repair the installation and sometimes you even have to reinstall the application to get it working again.
Some examples of registry cleaners that have resulted in these problems are:
- Abexo Free Registry Cleaner
- Eusing Free Registry Cleaner
- Norton SystemWorks
- Registry Mechanic
- Microsoft RegClean utility
Some Autodesk Knowledge Base document that deals with these problems:
- Error: Fail to create CommCntrClientSink object!
- Registry cleaners cause problems in Autodesk® Architectural Desktop 2005 - Working with tool palettes produces an error: Unable to Execute the tool. Class not registered.
- AutoCAD® fails to start after registry cleaner is run - The A program name changed from a.exe to acad.exe FATAL ERROR: Unhandled access violation Writing 0x0010 Exception at 7c918feah FATAL ERROR: Unhandled Access Violation Writing 0x50c52849 Exception at 6d0067h.
- Knowledge Base document: AutoCAD® fails to start or Property Palette cannot be used after registry cleaner is run
Another mentioning is in this blogpost No Properties in your AutoCAD Properties Manager? Perhaps it was an Overzealous Registry Cleaner.
Some advices if you still want to use a registry cleaner.
- If possible backup the registry so you can restore or undo the changes it if any problem shows.
- To avoid this problem, it is recommended that you configure your registry cleaner so that it does not scan Active X Com Sections and Active X Com Sub Key Sections