Every time I hit the fix selected issues button, first a window appears asking if I want to back up the registry. For some reason I cannot run down CCleaner is using up so much of the computers memory that I have to back up the registry before I check the issues, so I pick no. But it doesn't matter if I pick yes, no, or cancel, each will get me the error message window 7 - Out of with OK below it. The computer is an older eMachines running ME (yes, I know!) with a Celeron 900, 256 Mb of memory and a measly 27 Mb of hard drive. It's my backup. Acer has been fooling around with my other one in it's repair shop for two CENSORED months.

Have you tried selecting just a few issues at a time to remove? it maybe you have to many to remove at one go

I cannot even get to the point of removing even one issue. As soon as I click on the fix issues button, the message appears. How would I remove only a few issues, anyway? Wouldn't that involve stopping the scan after it has found only a few issues?

Also, that should be 27 GB of hard drive, not Mb. Sorry for the error.

Use "Scan For Issues",then right click and uncheck all,
just check off a few to remove then click "Fix Selected Issues",
That is what MikeW is referring to.