Ninjatrader does not start

[woodies]

My Ninjatrader 7 was working fine for last 6 months. However, since today morning its not opening any more.
I am getting a following warning

Description:
Stopped working
Problem signature:
Problem Event Name: CLR20r3
Problem Signature 01: ninjatrader.exe
Problem Signature 02: 7.0.1000.11
Problem Signature 03: 50c894fc
Problem Signature 04: System.Drawing
Problem Signature 05: 2.0.0.0
Problem Signature 06: 506c194d
Problem Signature 07: 7b0
Problem Signature 08: 6c
Problem Signature 09: System.ArgumentException
OS Version: 6.1.7601.2.1.0.768.3
Locale ID: 1033

I tried to reinstall the ninjatrader but it fails to start. I deleted the _workspaces folder from my documents section but it still fails to start. I am attaching log and trace files here. Please look into this and suggest me a solution for this. Thanks.

[NinjaTrader_Brandon]

Hello woodies,

Thanks for your post.

I see the following message in your trace
Font 'Arial' does not support style 'Regular'

To resolve this please download the attached file to your desktop
Extract the file
Open the Control Panel of Windows
Open Fonts

Drag and drop the arial.tff file into Fonts within the Control Panel

You now should be able to restart NinjaTrader

[woodies]

Thanks for a prompt reply.That worked instantly.....appreciate great support by Ninjatrader team.