Hello Ken Deyell,
mentioned situation was previously mostly caused by conflict with other extension installed into "right-click context menu", where solution was uninstallation (deactivation) of that extension or updating related application to latest version.
To check this possible conflict please download and run Microsoft Autoruns application. Then choose tab "Explorer" and disable (untick) one-by-one extensions at list:
- to find possible conflict one. Effect should be immediate after untick (restart should not be needed). You can then tick the non-conflict ones back (to enable them)
Please inform us about results of this process and which extensions are you using.
Since I have updated to AVG Free 2011 I am not able to scan a file by "right clicking" on it and then "scan with avg".However if I open the main AVG console\ individual files and select a file it scans it properly.The right click feature worked fine with my previous ver. 9 OS Vista home premium.I have not made any other changes.The only thing I can think of is with this new version of avg it has to be opened before the "right click" feature will work.