It seems like you are experiencing a Blue Screen of Death (BSOD) with error code 0x00000124 after installing Windows 7 on your computer. The error message in the event log indicates a "Machine Check Exception" related to a processor core issue, specifically a "Cache Hierarchy Error" on Processor 0. Here are a few steps you can take to troubleshoot and possibly resolve this issue: 1. Update Drivers: - Make sure all your drivers are up to date, especially the chipset drivers for your motherboard, graphics drivers, and CPU drivers. 2. Test RAM: - Even though you are not overclocking, running RAM at higher speeds (XMP profile) can sometimes cause stability issues. Test your RAM modules individually or run a memory diagnostic...