IE 7 Issues

[Velvetangels]

Ok so I have installed Avast! 4.7 on all of my computers. 

My computer works just fine.  However, my mother's computer which updated itself with Internet Explorer 7 is having problems.  Avast! is running fine, except IE7 no longer runs correctly unless she turns off Avast! .   She can not surf to any websites while Avast! is running in the background.   However if we turn off Avast! it surfs just fine to the different websites.  I have IE7 on my computer as well.

 Is there anyone else who is having this problem? if so, how did you fix this?  I am very confused as to why her computer has this problem, yet my own does not.

[Lisandro]

Which firewall does she use? Is ashWebSv.exe (WebShield from avast) allowed to connect?
Is there any other antivirus installed in your mother's computer?

[Velvetangels]

There is nothing else installed on the computer. we have completely uninstalled McAfee.  She is using the Windows firewall..  In fact i think she has the firewall turned off completely.

[DavidR]

avast doesn't use a browser to update, it is independent of a browser.

McAfee has an uninstall tool that you could run to ensure any possible remnants are removed.
http://download.mcafee.com/products/licensed/cust_support_patches/VSCleanupTool.exe
2007 version - http://download.mcafee.com/products/licensed/cust_support_patches/MCPR.exe

[Lisandro]

In fact i think she has the firewall turned off completely.

It's not safe. She does not have to do it...

Did you try to uninstall McAfee leftovers with the tool David posted?