Tony,

Windows has a built-in utility called System File Checker. If you have found that using Safe Mode keeps the PC alive longer than Normal Mode then use it. Then type sfc in the Start Search Window and then double click on the sfc.exe file. Let it run. It checks every Windows file including Microsoft drivers and replaces any that are corrupt or missing.

Windows has a built-in System Restore facility. Start/Control panel/System/Advanced System Settings/System Protection/System Restore. Then you should have a choice of dates to restore from. Select the most recent and follow the instructions. If that does not improve the situation you can go back further and try again.

Ian