System keep rebootting

[isolution]

I install VirtualBox in a Windows 7 machine version 4.1.0, was able to install Windows Server 2008 on the Guest host.
Now the computer reboots after 45 minutes, can anyone help me.
Why is the computer reboottin, and I don't know if is the Guest on the primary and there is no enter on the primary log.

[vbox4me2]

Check the eventlog's for error messages.

[isolution]

I did as I mention on my post no messages just after when the system reboots I get the message that
"The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly."
"The previous system shutdown at 5:14:13 PM on ?8/?14/?2011 was unexpected."

[vbox4me2]

Look up the auto-restart and switch it off, when it happens again there should be a BSOD message on the screen.

[isolution]

Yes thank I got the blue screen and it said to uninstall the last software or hardware I add to the system and on the event log I got this.
The computer has rebooted from a bugcheck. The bugcheck was: 0x00000019 (0x00000020, 0x87f4d920, 0x87f4d990, 0x080e0124). A dump was saved in: C:\Windows\MEMORY.DMP. Report Id: 081611-28111-01..
So I'll uninstall the virtaulbox.
Is there anything I can do to prevent this, I'm following the directions on the installation

[isolution]

One thing I add Shared Folders on the settings and install the additions on the Guest to be able to see the folder and transfe files between tham, is that correct procedure?

[vbox4me2]

Then it must be related to a VBox install, maybe a bad download, try another version or redownload.