Computer stops working when Unity Web Player is installed!

When I install Unity web player, my computer crashes and won’t boot. It won’t work until the hard drive is erased. I’ve installed Unity web player twice, and both times I’ve lost everything on my computer. I use Unity a lot, and I don’t have any problems except for sometimes I have compiler errors, and I need to delete my whole project because of them. The computer model is HP G62. I can give you the specifications if you need them.

Thanks for helping!

How will I boot the PC to see the dump file? It won’t boot after the Unity Web Player is installed.