WHY DOES IT TAKE ME SO LONG TO LOG ON?

The reason it takes so long is because your roaming profile has grown from its initial size of < 3MB to something much, much larger.  The purpose of the roaming profile is to insure that you see the same desktop information on any computer you log on to.  Your profile is stored on a network drive and is transferred to the computer when you log on.  It also is erased when you log off.  The time to log on is certainly a function of the size of your profile.  The greater it's size - the longer it takes.  There are a couple of reasons why your roaming profile may have grown so large.

1. The cache file created by Internet Explorer needs deleting. By default Internet Explorer allocates a fairly large percentage of the disk drive to store pages visited on the web (cache). Unfortunately, the cache file created resides within your profile.  To fix the problem, open Internet Explorer. Go to TOOLS - INTERNET OPTIONS and hit the 'Delete Files' button under Temporary Internet Files Folder. This will empty the cache.  Next choose the 'Settings' button under Temporary Internet Files Folder. Reduce the cache size to 1MB. Hit OK (probably twice to exit the menu) and close Internet Explorer. When you log off the computer your reduced profile will be copied to the server and your logon and logoff times should be greatly decreased.
2. You are saving data on your Desktop or in My Documents.  Do yourself a favor and store your data in your Z: drive folder.  Data stored on the Z: drive is not transferred to the computer until you need it.  It is not a part of the logon process. You can easily create a Desktop shortcut to your Z: drive folder by right-clicking on the Desktop, choosing New, Shortcut and pointing to your Z: drive folder from within the wizard.

Your 'My Documents' folder can be moved to the Z: drive by first creating a folder on the Z: drive named 'My Documents'; next R- click on the 'My Documents' icon on your Desktop; select PROPERTIES; select MOVE and use BROWSE to highlight the Z:\My Documents folder; continue following the directions to move all data to the new location.

3. Certain programs and websites write huge amounts of data to the profile folder.  Normally they are located in the 'Application Data' folder of your profile.  Each of the sub-folders found in the 'Application Data' folder is the name of an application or its manufacturer.  Unless the application is normally used it could be deleted.  A recent application that uses large amounts of disk space is Google Earth - it can be deleted (see below).

FOR YOUR INFORMATION -   A clean profile should be less than 3MB in size.   To determine the size of your profile, right-click on the START button and choose Explore.  This will open Explorer at your profile.   Right-click on the directory with the same name as your account, and choose Properties.   This will tell you the exact size of your profile.  By right-clicking on any of the sub-directories under your account name (and choosing Properties) you can see how much disk space each of them is using.  This procedure will help you to determine where most of the added space is being used.