To find out what programs are running resident on your computer, hit <ctrl> <alt> <del> at the same time. This should bring up XP's Task Manager window. The background processes running on your computer will be listed under the 'Processes' tab. Included among these will be several resident programs. The difference between resident programs, system services and client servers is somewhat difficult to discern unless you're familiar with operating systems. For the most part resident programs are called from the registry during boot to 'Welcome' screen and during loggon to desktop from mainly two keys(but there are others as well such as 'Notify'),
1) HKEY_LOCAL_MACHINE/Software/Microsoft/Windows/CurrentVersion/Run/(string entry, REG_SZ, filepath name),
2) HKEY_CURRENT_USER/Software/Microsoft/Windows/CurrentVersion/Run(string entry, REG_SZ, filepath name),
whereas, service modules and drivers are mostly called from HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet.
If you look down the list of modules in Task Manager, you can search and trace individual processes to their root location. Resident programs almost always trace to C:\Program files\(Name of Application folder). System services trace to C:\Windows\System32\(server executible file name). You will also find any applications you have presently opened on the same list, but these are easy to distinguish.
FTP(File Transfer Protocol) and TFTP(Trivial File Transfer Protocol) programs such as those using MFC require that your desktop settings and fonts be compatible with networking file exchange servers which usually default to client language and secure database specific display procedures unless otherwise set; Windows Classic Style was especially designed to do just that(a throwback to Windows 2000), as well as impose all necessary administrative restrictions and allowances as per individual setting. Unless you have FULL permissions for ALL settings, networking controls can continue to reset your XP style back to Classic.
However, this may not at all be your problem. You can check to see by right-clicking just above your 'Start' bar and selecting 'Themes' when the Display Properties window appears. Under 'Themes' you'll see a pull-down arrow; click on it and select "Windows XP," and then, 'Apply'. If the settings don't change, you need to go to your control panel and select 'System'. Click on the 'Advanced' tab, under 'Performance' click on the settings button. Under 'Visual Effects' select 'Custom' and then choose what you like and click on the 'Apply' button. Go back and redo the instructions for 'Display Properties'. If this doesn't work, you might well have either an active virus or a viral residue that needs to be cleaned up.
I'd like to help you with the error message your getting about "run32.dll," but I can't because I've never seen that file on any computer I've ever worked with.