Nick, See KB 875352 Try to change the boot.ini file to /noexecute=Always off on the windows XP workstations. DEP always is a pain, and is hard to manage, if all other security aspects are in place (GPO, NTFS permissions, firewall, antivirus and proper patch management ) you could skip this way of preventing to run arbitrary code. True iDEP has a preventive character. DEP is not a big hit but some people/companies might actually be using it, its not common to my knowledge that administrators manage this possibility) Stefan 2008/9/8 Nick Smith <nick@xxxxxxxxxxxxxxxxxx> > Guys, > > We've started having users download SP3 for XP. Once installed, when you > run RDP it throws an error saying Data Execution Prevention is preventing > it running. Also breaks the RDP ActiveX. > > > > Only solution we currently have is to uninstall – anyone got anything > better? > > > > Nick >