Sorry Lorraine you caught me in the middle of setting up XP Pro in Windows 7 Home editions. It can be done and I am going back through and gathering the screens shots now. Below are a few suggestions.
Could be caused by an incompatible device/driver.
The first thing I would recommend is disconnecting everything that's not essential, and see if that solves the issue. If it does, then add devices back over time to see if/when the problem returns. For example: System is fine.. shut down... add the USB device’s one at a time... start up... wait until system is slow... Now you know what device is the cause.
I know I have two Flash Drives, an External Hard Drive and a NAS drive connected and they reek havoc on startup time if I forget them.
The following are not mine but should give you some more ideas.
You can also:
Run problem reports: http://www.sevenforums.com/tutorials/45 ... tails.html
Use the Troubleshooting tool: http://www.sevenforums.com/tutorials/47 ... oting.html
Start to Safe Mode and do things like repair your computer: http://www.sevenforums.com/tutorials/66 ... tions.html
Please respond and let us know the status of the issue.
Gary - InternetFixes Support.