COh worked fine till yesterday, now stuck onloading screen

I was trying to put a new graphics card and PSU into my computer, uninstalled the drivers for my nvidia card, turned the pc off and put in the new radeon card and replaced the old 350watt PSU with a 400-450PSU. It didn't work, I think the new card may be faulty as I got no signal on the monitor, so I put the old graphics card back but keeping the new PSU in and used system restore to return to a point just before uninstalling the old drivers. Now Coh gets stuck at the loading screen just prior to the login.

Edit: Also would be quite impressed if anyone could tell me why I can't get a second monitor to work with this set up, trying to get a second monitor to have dual monitors was the reason I got the new graphics card and PSU, was suggested to me the graphics card was to blame nad hece replace it. It still works fine but can't get a second monitor to work off it.

For clarity incase my rambling is overly confusing
old graphics card(currently in system): Nvidia 9400 GT
new card(didn't work so back in box) Radeon 5450



Coh Helper info:

---System information gathered by CoH Helper version 0.2.0.2---

DxDiag gathered at June 29, 2010 18:43 (+01:00)
Operating System: Windows XP Home Edition (5.1, Build 2600) Service Pack 3 (2600.xpsp_sp3_gdr.100216-1514)
System Manufacturer: Compaq Presario 061
System Model: EC520AA-ABU SR1519UK GB530
BIOS: Phoenix - Award BIOS v6.00PG
Central Processor: AMD Athlon(tm) 64 Processor 3200+, MMX, 3DNow, ~2.0GHz
Memory: 2558MB
.Net Memory Report: 1444MB out of 2558MB available
Page File: 3568MB (878MB currently in use)
I Drive: (MAXTOR STM3320820A) 101962MB out of 305234MB (33%) free
D Drive: (PIONEER DVD-RW DVR-116D) zero-size drive
E Drive: (HL-DT-ST DVD-ROM GDR8164B) zero-size drive
Windows directory location: I:\WINDOWS
DirectX: DirectX 9.0c (4.09.0000.0904)
DirectX Diag version: 5.03.2600.5512 (32-bit version)

Display Notes: No problems found.
Sound Notes: No problems found.
Input Notes: No problems found.

Monitor: Plug and Play Monitor
Monitor's Max Resolution: 1600,1200
Video Device Name: NVIDIA GeForce 9400 GT
Manufacturer / Chip: NVIDIA / GeForce 9400 GT
Video Memory: 512.0 MB
Driver Version: 6.14.0012.5721
Driver Date: 06/08/2010 00:57:00
Driver Language: English

Sound Device Description: Realtek AC97 Audio
Driver File: ALCXWDM.SYS
Driver Version: 5.10.0000.6240
Driver Date: 01/01/0001 00:00:00


WMI Information
Motherboard Manufacturer: MSI
Motherboard Model: (empty)
Motherboard Product: AMETHYST-M
Motherboard Version: 1.0
BIOS Manufacturer: Phoenix Technologies, LTD
BIOS Name: Phoenix - Award BIOS v6.00PG
BIOS Version: HP-CPC - 42302e31
BIOS Release: 20050708000000.000000+000


Registry Information for Current User
Resolution: 1280x1024
3D Resolution: 1280x1024 (Not using renderscale)
Full Screen: Yes
Maximized: No
Screen Position: 0, 0
Refresh Rate: 60Hz
Vertical Sync Enabled: Yes


Physics Quality: Medium
Maximum Particles: 50000
Max Particle Fill? 10.000
Physics Card Enabled: No


Anti-aliasing: Off
Anisotropic Filtering: 4x
Texture LOD Bias: Smooth
Water Effects: Medium quality
Bloom: 1.000 (turned on)
Depth of Field Enabled: Yes
Desaturation Effects (Sepia) Enabled: Yes
Shader Detail: Medium?


World Texture Level: Very High
Character Texture Level: Very High
World Detail Level (Vis_Scale): 1.000
Entity Detail Level: 1.000
Shadows Enabled: No
Shadow Mode: Stencil shadows
Shadow Map Shader: Unknown (0)
Environmental Reflections: Disabled
Advanced Occlusion Settings: No
Ambient Occlusion: Off
Occlusion Strength: Off
Blur: Bilateral
Ambient Resolution: Performance


Gamma Correction: 1.000
Geometry Buffers (VBOs) Enabled: Yes
Suppression of FX When Camera Close Enabled: No
Close Suppression Range: 3.000
Show Advertisements: Yes

Audio Mode: Performance
3D Audio: No
FX Sound Volume: 0.349
Music Sound Volume: 0.000

Show Advanced Graphics Options: No
Overall Graphics Quality: 0.500
Reverse Mouse Buttons: No
Save Login Username: Yes
Transfer Rate: 197843 bytes/second
Current Game Version: 1800.201006040036.3T
Installation Directory: I:\Program Files\City of Heroes

Mod files in the Data directory
.\texture_library\MAPS\city has 1 file
.\texture_library\MAPS\Midnight_Squad has 1 file
.\texture_library\MAPS\Safeguard has 9 files
.\texture_library\MAPS\sewers has 44 files
.\texture_library\MAPS\static has 32 files
.\texture_library\V_MAPS\Outdoor_Missions has 9 files
.\texture_library\V_MAPS\Static has 16 files

I'd recommend uninstalling the nvidia drivers again, but this time reinstall from the drivers installer (downloading a new one if needed). It's quite likely that the restore point didn't restore all of the drivers files (such as ones related to OpenGL), which the nVidia installer should be able to fix.

We've been saving Paragon City for eight and a half years. It's time to do it one more time.

That appears to have fixed it, thanks.