Perform the steps outlined in Microsoft KB 931908; either install the hot fix or manually delete the files in the service user's temp directory. (Directory will be C:\Users\<bit9 useraccount>\AppData\Local\Temp on Windows 2008 and newer servers)
Windows Vista hotfixes and Windows Server 2008 hotfixes are included in the same packages. However, only "Windows Vista" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows Vista" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.