Error opening Excel file from windows explorer

Error: There was a problem sending the command to the program.

Windows 7 x64, Office 2007,
McAfee anti-virus
corporate laptop

I have tried all options found on the web, and noe have worked!

check/uncheck DDE request
check/uncheck Run as adminstrator

In the event log
Event log:

The following boot-start or system-start driver(s) failed to load:
PBADRV
Process **\mcshield.exe pid (2736) contains signed but untrusted code, but was allowed to perform a privileged operation with a McAfee driver.
Process **\VsTskMgr.exe pid (2472) contains signed but untrusted code, but was allowed to perform a privileged operation with a McAfee driver.


are there any registry settings to change??
are there any other top secret options to tweak?

thanks

sportsguy

yes, as stated in my original post.

any other suggestions which i haven't tried from my original post?

thank you