Jimtherev,
No, I used AVG before the windows reload, then Avast after.
Sprogget,
Looking through the event viewer (new to me) I find, in the six days since starting over with reloaded windows, there are:
4 Errors, Source, Windows update agent, Category Installation, Event 20
9 Errors, Source, System Error, Category 102, Event 1003
3 Errors, Source, Service Control Manager, Event 7031
12 Errors (in 4 groups of 3), Source DCOM, Event 10005
1 Error, Source, RasMan, Event 20032
None of which means much to me, but may do to you. RasMan sounds a bit suspicious though.
Is anything significant?
Thanks to all for helping