If yes, then surely better to do repair install than to use some registry cleaner prog.
Win7I'd perform a clean install or repair install vs trying to patch registry holes. I have fought many battles with Windows Registry problems and its way easier to set it back to clean state by clean BUILD or repair install.

Although I had to deal with orphan registry ENTRIES a long time ago with a HP Pavilion Celeron 700Mhz computer running Windows Me that I attempted to upgrade the cheap model from CD-ROM to CD-RW and Roxio Easy CD Creator which came bundled with the CD-RW would not install because the software detected a prior version of Roxio Easy CD Creator installed. When going in to see what was installed. Roxio Easy CD Creator was not in the list. When going to http://www.karenware.com/powertools/ptpruner.asp I downloaded and ran Karens Registry Pruner and found orphan registry entries which was the result of HP using a same image for multiple products of the same family, but they used a dirty uninstall method that left orphan registry entries as PART of every computer of this model that was ever made. It was part of the system recovery set, so HP had this hidden problem as part of the cheap computer for everyone who ever bought this model, and only those who tried to upgrade to CD-RW would have hit this roadblock. The only fix was to either borrow someones Windows Me OEM Disc to install clean or use this tool to remove the orphans. Used this tool to remove the orphan entries and problem resolved, was able to install Roxio Easy CD Creator 5 and use it to burn CD's. Shortly later I got tired of Windows Me and upgraded to Windows 2000 Professional which was far better.Never, NEVER use registry utilities. They CAUSE problems, they don't cure them.bt allan.......you ALWAYS recommend cc cleaner too......He does...as do others.
But not the Registry component of it.Actually no, I've never recommended ccleaner. Quote from: Allan on June 26, 2013, 05:27:30 AM

Actually no, I've never recommended ccleaner.

Indeed, the closest thing I can find to a recommendation would be "ccleaner is useless"