Microsoft rolled out it Windows Vista Service Pack 1 to select customers recently. The SP1 update drew mixed reviews according to initial testers. However, while SP1 is relatively stable, it pulls in Windows Updates and one particular prerequisite update is giving people serious problems.  Microsoft rolled out three prerequisite updates last week through Windows Update to prepare users computers computers for Windows Vista SP1. If customers tried to install Vista SP1 without the update, the SP1 install process would simply go and grab the update. One of these updates, KB937287, caused some serious issues among some users. As Vista SP1 automatically grabs this update, some users experienced side effects during the SP1 installation process.