Windows reboots after loading "Welcome" screen

[Luxury]

[This post updated]

Hi guys,

Current problem:
After the "Welcome" screen comes up for ~5 seconds, my monitor turns black. It is still receiving a signal. Sometimes, it reboots after a while.
Windows 7 does not seem to recognize my monitors (see 'background' below for more)

Origin:
I believe the problem is between Windows and my monitors/their drivers

Booting
1) Normal boot, I always get the above problem
2) Booting in 'low resolution mode', I do NOT get this problem IF the nvidia drivers are NOT installed. otherwise same problem
3) Safe mode, I never have this problem

Background
I had the same problem in XP, and it was fixed after I installed my monitor's drivers.
I cannot install the drivers in 7.
There is no 'Monitors' in Device Manager, let alone any 'Generic PnP Monitor'.
Windows Update does find the 971p (one of my monitors) drivers, but they do not work. But this seems to suggest 7 at least somehow recognizes my monitor.
971p is listed as supported on MS' site ("64 bit supported, no action needed")

Specs:
Windows 7 Pro 64 bit
ASRock K8Upgrade-1689 Motherboard
AMD Athlon 64 3400+
2GB DDR333
GeForce 7600GS 128MB

Monitors:
Samsung Syncmaster 971p (DVI)
Viewsonic VA903b (VGA)
(Only have one plugged in at a time)

Thanks a lot in advance.

 

[iTom]

Mine did this back in the XP days mate, I just reformatted the PC and everything was fine

 

[Luxury]

Thanks for the response iTom. Ironically, I decided to reformat my pc and go back to XP, but I'm still getting the same problem - a black/blank screen after the windows logo followed by a reboot - only now it's in XP.

I've spent the majority of today and yesterday on this and am getting quite desperate.

 

[Venths]

After reading the above things, I come up with some of these instructions:

* If you have an add-on video card & RAM, you could try re-seating the card. Remove and re-seat.

* You can check if there is a problem with the heat sync.

* Try resetting the BIOS Jumper once

 

[zigzag3143]

Thanks for the response iTom. Ironically, I decided to reformat my pc and go back to XP, but I'm still getting the same problem - a black/blank screen after the windows logo followed by a reboot - only now it's in XP.

I've spent the majority of today and yesterday on this and am getting quite desperate.

Hi and welcome

same problem in 2 OS is hardware. possibly ram, heat?, or cpu. Bios upgrade maybe.\

 

[usasma]

H/W Diagnostics:
Please start by running these hardware diagnostics:
Memory Diagnostics (read the details at the link)
HD Diagnostic (read the details at the link)

 

[Luxury]

Thanks for all your inputs. I made the same conclusions like you guys, until I tried installing my monitor's drivers. That fixed everything under XP.

I'm now back to Windows 7. I can't get either of my monitors' drivers to work, although I think this is partially Windows's fault.

(I updated my original post, here is a short summary: )

In device manager, there is no "Monitors" listed, as you would expect it to show up under that list as "Generic PnP Monitor". Instead, it doesn't seem to recognize anything.

Here's the weird thing. When I run Windows Update, it automatically finds my monitor's drivers (correct model). Although it fails to install them, at least that suggests it does detect my monitor, which contradicts the device manager.