fidget77

The only differences I can find in registry (HKEY_LOCAL_MACHINE\SOFTWARE\Piriform\CCleaner) are the Patches key and the StateSig key. So, there must be a different version between the 2 machines. Both show CCleaner v6.09.10300 (64-bit) at the menu though...

Have you tried uninstalling (either through Revo or not), reinstalling, comparing registries and ini files?

The same thing happens to me. On my PC and laptop, there is no welcome screen. On my dad's PC the welcome screen keeps coming back. I think it is a version of CCleaner that did this! Aka, we skipped an update on the PC that the welcome screen does not appear! I can't access my dad's PC atm to check this. Try uninstalling with revo uninstaller and reinstall, also overwrite files with the PC one's w/o the welcome screen. Let me know, If I fix this I will let you know, as well!

You are absolutely right! Welcome back screen reappeared. I had to go your way, I turned off welcome screen in registry. You make me wonder If I should use Portable version now. I use portable version for all other Piriform products but for CCleaner I'm scared of the new CCleanerPerformanceOptimizerService that runs in the background. It puts all my programs to sleep through Performance Optimizer. I have dozens of programs there like Onedrive, Dropbox, Teamviewer, Java, Nvidia services, Realtek, Apple, Wondershare, etc. I adore it! What do you think? Are you using Pro version as Portable? Which Portable version are you using? I use a combo of PortableApps.com and SyMenu. CCleaner Portable is there on both! I also use CCEnhancer...

I fixed it by reinstalling CCleaner, Will have to recheck registry too now. I'm fine with editing it. I was thinking I had to edit ccleaner.ini file instead because I always have ticked: "Save all settings to INI file" in CCleaner options. I've never seen these registry options. Good to know... Tyvm ^^

How did you do it?

Ccleaner will not reenable/delete startup programs. I also have duplicate entries, one entry can be disabled renabled deleted other can't. Error message I get is: Failed to delete startup item. The system cannot find the file specified. I guess this is related to these startup entries only: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Shared Tools\MSConfig\startupreg Open in Regedit option redirects to: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Shared Tools\MSConfig\startupreg in regedit, but not to the specific registry folder of the startup program in startupreg folder. It seems CCleaner startup screen is full of junk obsolete entries. Any way CCleaner can clean those entries? Maybe they were created by a buggy version of CCleaner and should be deleted from my registry manually? Is there a way to reinstall/clean CCleaner from these startup entries without losing my registry/files Cleaner settings and options? Is there a way to allow CCleaner to reenable delete or fix these entries if they should not be removed from registry? Duplicate entries maybe mean that they are in duplicate places in registry (both startupreg of MSConfig or CurrentVersion/Run) Can this be a Windows 10 issue: CCleaner just has no access to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Shared Tools\MSConfig\startupreg and so can delete or move entries from there to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run or HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run or whatever else mentioned above in this topic. Can these be non working entries related to another software conflicting with CCleaner? Anyways, this seems to be a bug which needs a fix. Any help would be appreciated!