The only cleaner besides Disk Cleanup I would use is CCleaner which has proven itself over 15 years and is perhaps the single most respected app in the tech world - used by programmers and Grandma alike.
I've installed it on hundreds of computers representing thousands of regular uses without a single complaint for either its Disk or Registry cleaner, nor have we been presented here yet with a single verifiable case of it causing problems.
Most all other "Registry Cleaners" are advertising sales scams without any of the genius that is packed into CCleaner. They will ruin your Windows 7.
There are other tips here to Clean up factory bloatware
while monitoring that this is not damaging System Files.