Lock ups and auto reboots

[PhilzzGood]

My computer frequently is locking up and automatically rebooting itself. The only error messages I ever get our from IE that say iexplorer has generated errors and needs to be closed. I can okay the message and continue browsing but eventually I get a lock up or auto reboot.

I recently formatted my hard drive and have started all over with all applications. Currently I'm only running windows and have my wireless nic drivers installed.

Thanks,
Phil