Hi Again -
followed your advice - but it seemed AVG files were still on PC and preventing Avast from installing
In meantime received some addit advice from another forum ( Majorgeeks) and in case this helps others
Here is how I finally got Avast to install 1. Do Standard Vista 'Programs and Features' > Uninstall AVG
2. Restarted system
3. Ran official AVG Removal tool for a 32 bit system
4. Restarted System
5. Ran AVG remover a second time
6. Restarted system
7. Searched Program Files and User Data files for any folders for AVG ( suprising how many found) and then DELETED THEM.
8. Ran 'CCleaner - 'Run Cleaner' and then its 'Registry Scan> Scanned for Issues > Selected Fix all Isuues' and did that 4/5 times until '0' issues found.
9. After the above was finally able to install AVAST.
THANKS to everyone for their help & Support this is a gr8 Forum and chuffed to have now got Avast up and running
Try the uninstaller utility that DavidR suggested anyway. There has to be some remnants left, as Win Vista has been thoroughly tested by lots of us, and so far there aren't any problems.
Give it a shot and tell us how it goes.