Cleaning - Deleting Temporary Files

I ran CCleaner to Analyze only Temporary Files. It came up with something like 99 MB of Temp files. I opened Explorer and went to Documents and Settings > Owner > Local Settings > Temp where there was/is over 600 files plus 11 folders. I deleted a few of the files that had .tmp extensions. Then I ran CCleaner just like I did before. This time it came up with 0 bytes to be removed. I shut it down, opened it and ran it again. Same result, yet there are still 622 objects (88.7 MB) in my Temp folder.

Question #1: What is it that CCleaner analyzes or cleans when System, Temporary Files is ticked?

Question #2: Lots of the files have .xml file extensions. Is it safe to delete them?

Thanks.

System: Win XP, SP2

If I got it right dose not come out till reboot, so reboot & check. all files in temp be safe to clean so long not a update. :rolleyes:

Maybe your %TEMP% environment variable is incorrectly set?

What do you get if you type echo %temp% in a command prompt?