Proxy server keeps being checked off in browsers

I have a computer on a worgroup network in a small office.   It is

 running Win XP.    It seems like eveytime there is an update run for McAfee, the proxy server settings in IE and Mozilla Firefox get checked and the user cannot access the internet until the proxy server is unchecked.   I have run Malwarebytes and Spybot with little return for threats.  No one on the network has this issue even though they are using McAfee.
Who is Participating?
AmmarRConnect With a Mentor Commented:
go to gpedit.msc
from run and check your proxy settings, may be its enabled in the group policy

thetimeConnect With a Mentor Commented:

Expand User Configuration
Expand Administrative Templates
Expand Windows Components
Select Internet Explorer
Edit "Disable changing proxy settings"
Set to "Enabled"

Change proxy settings to what you want it to be before setting this policy.
bbaoConnect With a Mentor IT ConsultantCommented:
if the proxy setting of FF is also changed, it should NOT be Group Policy related as FF does not use the Internet Settings of IE and Windows at all.

i would guess it is caused by some kind of security software installed on the computer such as the one mentioned above: McAfee.

try disabling or remove it for test??
Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

syssolutAuthor Commented:
BBao, I will try that.   I am seeing them in two days.   Thanks
Sudeep SharmaConnect With a Mentor Technical DesignerCommented:
It seems that your is infected since it is effecting both Firefox and IE as per my understanding.

To clean you system do the following:
Run malwarebytes in "Safe Mode" with Networking and update it before running a full system scan
Note: you should rename the mbam.exe to some dummy name like and then run it.

Then try HitManpro to make sure anything which might be left behind is clean:


If issue is not resolved by these tools try TDSSKiller:

Tutorial on TDSSKiller:

or you could also try FixTDSS.exe from Symantec

If this does not resolve your issue then try Combofix:

Download Combofix

Note: you should rename the Combofix.exe to some dummy name like and then run it.

Tutorial on how to use combofix:

Post logs here for further analysis.

syssolutAuthor Commented:
Sorry I didn't reply on this.   All of a sudden, the issue has stopped.   I am not sure why, but I have not heard anything about this since.
syssolutAuthor Commented:
Thanks for your suggestions.
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.