discobiskits

Actually that sounds like a very plausible explanation... I was able to install the software I was having problmems with simply by unchecking "runccleaner at system startup" and rebooting. one day I will have to reformat and reinstall my OS. I will pay closer attention to this and see if I can narrow it down definitively. Like I said ccleaner is great software and the support I have encountered in this forum is top notch, thanks for the replies and suggestions.

I forgot to mention that I don't use any registry cleaner other than ccleaner's reg cleaner, and that I am using ccleaner 1.26.218. will get back to you with the results of the uninstall.

Thank you for your reply. It is actually the same computer, i have only recently upgraded to win XP. Everytime I boot the machine it tells me it is updating the config files....and I am fairly certain that this strange behaviour starts after installing ccleaner. (Also, I should note that I check "run ccleaner when system starts" in the options menu.) With win98 it wasn't a problem, I could always install software. With WinXP however it will not let me install certain softwares without a reboot...and a reboot does not clear up the problem. It tells me that "a previously installed program requires a reboot" or some such error. I have done some searching and I wonder if this problem is related to the "index.dat" problem people have been having? ---> http://forum.ccleaner.com/index.php?showto...47&hl=index.dat I will try uninstalling ccleaner - I am guessing it will resolve the problem. After which I will get back to you with the result. Thanks again and ccleaner is a great proggy.

every time i boot up I get the message: "please wait while setup updates your configuration files. completed updating files, continuing to load windows" on the boot screen. This usually happens when I install a new piece of software that requires a reboot This problem happens in both Windows 98SE and Windows XPSP2. I suspect it is caused by CCleaner, because it starts happening when I install ccleaner. Also, I am having trouble installing some new softwares in Windows XP because the OS tells me that "a previous install requires a reboot" and it shuts down the installer. CCleaner is a great program I use it all the time and I appreciate all the work that everyone involved did to make it so great. However it is crippling my computer. =(