Everytime I shut down my PC, when Windows gets to the "Logging Off" screen, I get a "boop" noise (the gentle error noise), but cannot see the issue, since the "Logging Off" screen is in the way.

I checked the Event Viewer, and under Application at the time of the shutdown, I have an entry that says:

"WARNING:  
Windows saved USER NEWDELL\Paul registry while an application or service was still using the registry during log off. The memory used by the user's registry has not been freed. The registry will be unloaded when it is no longer in use. "
This is often caused by services running as a user account, try configuring the services to run in either the LocalService or NetworkService account.

It also sometimes has this entry:

"Warning:Windows cannot unload your classes registry file - it is still in use by other applications or services. The file will be unloaded when it is no longer in use."

The problem is, I have no idea when this started. I have noticed it for quite a while, but never looked much farther than Event Viewer.

I have not noticed any other performance issues.

Any idea where to start troubleshooting? You think this is anything to be concerned about?

PKTry CCleaner--hang on, I'll find a link to a download site. . .Okay, I found the link. you can get CCleaner here:

http://www.ccleaner.com/download/And do what with it, exactly?

PKAfter you INSTALL it, run the program. click "analyze", then when it finishes, click "run cleaner" when that finishes click issues (on the left of the screen) then click the button "scan for issues" when it finishes, if it finds anything, click the button to fix the issues.Note that the standard CCleaner download file includes Yahoo toolbar.  To avoid installing Yahoo toolbar [and I recommend not installing it], uncheck a box for it that appears soon after starting the installation of CCleaner.Just curious, what would I hope that this accomplishes? I have run CCleaner on another machine and am somewhat familiar with the program. Are you thinking that it is an error in the Registry?

PK

we want you to make sure the registry is clean.  if that DOESN'T solve the problem, we can proceed with a machine that has a clean registry. Sounds logical.

I am always nervous when it comes to PROGRAMS that "automatically" clean the registry. That is why I have never used it on this particular machine. I know a lot of people use CCleaner, so that helps, but is there any thing to be concerned about or should i just trust the program and let it do its thing?

PKCCleaner is really not as an aggressive a registry cleaner as numerous other tools designed primarily for registry cleaning.  I've used it for quite awhile and have never experienced a problem with it removing something from the registry that should not have been removed.  My impression, from VARIOUS forums, is that CCleaner has an excellent reputation for being safe to use.  So, I say don't worry about using the Issues scan, the part that scans your registry.I use issues scan and one time it found a whole bunch of issues, which i fixed.  issues can slow the computer down. Quote

I use issues scan and one time it found a whole bunch of issues, which i fixed.  issues can slow the computer down.