Broken Vista

I purchased a new PC with vista and CA anti-virus 2009 software. The computer came with mcafee trial version which i have already uninstalled. Now when I try to install CA anti virus i get a dialog box saying setup.exe has stopped working and I cannot proceed installation. I pasted the error message below. Any help on this issue is appreciated.

Problem signature:
Problem Event Name: APPCRASH
Application Name: SETUP.EXE_InstallShield
Application Version: 12.0.0.58849
Application Timestamp: 45b1a378
Fault Module Name: SETUP.EXE
Fault Module Version: 12.0.0.58849
Fault Module Timestamp: 45b1a378
Exception Code: c0000005
Exception Offset: 0001e7b9
OS Version: 6.0.6001.2.1.0.768.3
Locale ID: 1033
Additional Information 1: 54d4
Additional Information 2: a0234bcc811dd42f41b5502870808b14
Additional Information 3: 8483
Additional Information 4: 5a611b03cbf5e67fc6ff7d3a48e91b47