The error indicates a service or program is conflcting at shutdown. Take a look at the services on your computer and let us know if any are being run as your user account. Click Start, Run, type in services.msc, click OK. You'll see five colums in the Services console. The last one one the right is "Log on As". Click the column header to sort the column and scroll down to view all the user names the different services use. Do
any use your specific user account name? If so, please list.
It may be as simple as changing the account for those services.
There's only: Network Service, Local System, and Local Service.