On 19 Mar, 23:45, HappyPappy
wrote:
Running on Windows XP, with Grisoft AVG as a virus scanner.

If I double click on a file in Explorer Excel comes up but not the selected
file.

Excel starts, sez "Requesting Virus Scan" then "Ready" but no spreadsheet
comes up.

If Excel is already open the double clicking seems to work correctly, if I
click Excel Options then Cancel then the file also comes up but not otherwise.

I tried the /unregserver and /regserver stuff with no luck.

Any advice appreciated.

Thanks.

Have a look at this - from Microsoft's knowledge base:
http://www.kbalertz.com/Feedback.aspx?kbNumber=211494

CAUSE
This problem may occur if the Ignore other applications setting in
Excel is selected.

Back to the top
RESOLUTION
To resolve this problem, follow these steps:
1. On the Tools menu, click Options.
2. Click the General tab.
3. Click to clear the Ignore other applications check box, and then
click OK.
After you do this, you should be able to open workbooks by double-
clicking them in Windows Explorer.

HTH

Andrew