Avast Pro crashing - help please

Avast Free Antivirus / Premium Security
1

Following an auto update, Avast did a full scan on Win 7 PC reboot. Now Avast Pro crashes every time I try to start it. Have tried Repair and reinstall but it always crashes with this detail:

Problem signature:
Problem Event Name: APPCRASH
Application Name: avastUi.exe
Application Version: 9.0.2006.159
Application Timestamp: 525c2451
Fault Module Name: ntdll.dll
Fault Module Version: 6.1.7601.17725
Fault Module Timestamp: 4ec49b8f
Exception Code: c0000005
Exception Offset: 00040148
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 2057
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789

I am not comfortable running without protection (!) so grateful for a fix for this ASAP
thanks

2

When you re-installed did you run the Avastclear programme ?

Download Uninstall Utility to your Desktop.
Download the correct version of Avast
Avast Free
Avast Pro
Avast Internet Security
Avast Premier
Disconnect from the net
Uninstall Avast via control panel

[]Run aswClear
[]It will offer to reboot to safe mode

https://dl.dropbox.com/u/73555776/aswclear.JPG

[*]In the Select Product to Uninstall dropdown choose the version of Avast that is on your system.
[*]Press Uninstall
[*]Once complete reboot your system to Normal Mode
[*]Reinstall Avast