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Created: January 3rd 2012
Last updated: May 1st 2020
Categories: IT Support,  Windows 7
Author: Marcus Fleuti

Windows 7 can not obtain a new IP address from the DHCP server and DNS names cannot be resolved anymore when Adobe CS3 is installed

Tags:  Adobe,  DHCP,  DNS,  Windows 7
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We often experience a problem when using an older Adobe CS3 installation together with a Windows 7 (x32 or x64) installation. In that case Windows does not fetch IP addresses from DHCP anymore. Also DNS resolution does not work anymore.
This happens because an incompatible version of the mDNSresponder service is installed together with the CS3 suite. The problem can be resolved as follows:
Open up a CMD (console) with administrative privilegues

START -> Enter 'cmd' -> Press CTRL+SHIFT+ENTER

Change directory to c:\program files (x86)\Bonjour

cd "\program files (x86)\Bonjour"

Remove mDNSResponder service with this command

mDNSResponder.exe -remove

Reboot your computer

Important note: Apple iTunes uses this service together with its Bonjour propagation services. You might need to re-install Apple iTunes after you did this!