Thanks for your help, i have followed your instructions although i cannot be sure that i was in safe mode as the system rebooted itself a couple of times whilst i was selecting safe mode.
The log from SUPER is below. I have re-tried installing Flash Player and I got the same Dr Watson debugger error as previously described.
SUPERAntiSpyware Scan Log
http://www.superantispyware.com
Generated 07/02/2009 at 00:57 AM
Application Version : 4.26.1006
Core Rules Database Version : 3965
Trace Rules Database Version: 1905
Scan type : Complete Scan
Total Scan Time : 01:01:25
Memory items scanned : 434
Memory threats detected : 0
Registry items scanned : 5749
Registry threats detected : 12
File items scanned : 62443
File threats detected : 0
Adware.IWinGames
HKU\S-1-5-21-227610923-729723663-2695900469-1005\Software\Microsoft\Windows\CurrentVersion\Ext\Stats\{8CA5ED52-F3FB-4414-A105-2E3491156990}
Adware.Zango Toolbar
HKU\S-1-5-21-227610923-729723663-2695900469-1005\Software\Microsoft\Windows\CurrentVersion\Ext\Stats\{EA0D26BD-9029-431A-86E0-83152D67828A}
Adware.MyWebSearch/FunWebProducts
HKU\S-1-5-21-227610923-729723663-2695900469-1005\SOFTWARE\FunWebProducts
HKLM\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MYWEBSEARCHSERVICE
HKLM\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MYWEBSEARCHSERVICE#NextInstance
HKLM\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MYWEBSEARCHSERVICE\0000
HKLM\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MYWEBSEARCHSERVICE\0000#Service
HKLM\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MYWEBSEARCHSERVICE\0000#Legacy
HKLM\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MYWEBSEARCHSERVICE\0000#ConfigFlags
HKLM\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MYWEBSEARCHSERVICE\0000#Class
HKLM\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MYWEBSEARCHSERVICE\0000#ClassGUID
HKLM\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MYWEBSEARCHSERVICE\0000#DeviceDesc