Help!-- Unexpected System reboot

[Davinci2k1]

I'm hoping someone can help me try to figure out an issue with a new system I just built.
P4 2.4 mhz on an MSI 845 GMAX Mobo w/ 512 MB PC2700 DDR. BIOS is up to date.

I'll be working and .. all of a sudden *poof* ...the system resets!
-starts rebooting. I don't think it's a brown out in my electrical supply as I have another PC on the same power circuit which does not reboot.

What could cause such behaviour?
Does this sound like a motherboard issue? I'm using a decent quality Enermax350w Power supply.

Any suggestions? I'm thinking of using some cooling compound on the heatsink ( cpu is running about 45 deg.)

I don't have any idea what is causing this - happened 4 times last night.

Any suggestions would be appreciated. I'm new to building my own PC's - and don't know what to do when I run into an isue like this.

🙁

 

[LiLithTecH]

What OS?

What Video card?

Any USB Devices?

If you are using Win2k or XP, have you checked the Event Log to see what
error has occured?

 

[Davinci2k1]

Hey thanks,

here's the rest of my system specs:

HD: Western Digital 80 GB 7200 rpm
OS: Windows 2000 Professional with SP3 installed (v. 5.0.2195)
Video: MSI GeForce4 Ti 4200
other PCI: generic 56K modem card installed
USB devices: Using a USB Lexmark Z25 inkjet as well as a logitech optical mouse.

As you suggested, I figured out how to use the event viewer,
found these System event logs around time of the mysterious reboots:
- - - - - - - - - -
Event
Source Save Dump Event ID: 1001
The computer has rebooted from a bugcheck.
The bugcheck was: 0x0000007f (0x00000008, 0x00000000, 0x00000000, 0x00000000).
Microsoft Windows 2000 [v15.2195]. A dump was saved in: C:\WINNT\Minidump\Mini121102-01.dmp.
- - - - - - - - - -
Also under Application Log: ( A whole bunch of this same event/warning)
Event ID: 61
WMI ADAP was unable to process the PerfDisk performance library due to a time violation in the open function
Hmm.....?