I did manage to boot into Safe Mode (F5) before writing this forum thread. Furthermore using Safe Mode I performed a System Restore (to about a month ago), however the problem remains.
When AVG detected and removed the virus I suspect that it corrupted or otherwise affected (deleted or quarantined) an important file related to Windows booting correctly.
Since receiving your feedback I have used the following 'Advanced Boot Options' (F8) -
- Last Known Good Configuration (advanced)
- Disable Driver Signature Enforcement
After each of the options above I have rebooted, and in all cases the same 'load loop' behaviour (as shown in the original video link) has persisted.
Finally I have loaded the Windows Vista installation disk and selected 'Repair your computer'.
The 'System Recovery Options' dialog box does have my Vista install listed under the 'Operating System' column, and I am able to click on 'Next' and proceed to the list of available options. However when I choose the top option 'Startup Repair' there are no issues found (as shown below)!
I am now considering Command Prompt Options, such as 'Fixboot', however I would like some advice before doing so. Can you please offer further suggestions?