Andy - Did you get to the bottom of this one?. I'm having the same issue - I had initially assumed that it was to do with the way that I'd set up and replicated the mandatory profile I'd put together. Most stuff on the web points to the registry key you mention but I can't actually see anything wrong with it. Regards, Alan. ________________________________ From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Andrew Wood Sent: 13 May 2010 09:29 To: thin@xxxxxxxxxxxxx Subject: [THIN] default search provider being corrupted in IE8 I've got a site where they're looking to roll out IE8 on their W2k3 XenApp servers Everything installs and is (relatively) dandy - other than a message for users about the search engine getting 'corrupted' whenever they log on: A Program on your computer has corrupted your default search setting for Internet Explorer. Internet Explorer has reset this setting to your original search provider. Internet Explorer will now open Search Settings, where you can change this setting or install more search providers. It seems that this is happening because IE8 appears to want HKCU\Software\Microsoft\WIndows\Currentversion\explorer\user shell folders\appdata to be %USERPROFILE%\appdata - rather than the redirected value it currently is. Has anyone come across this and got a "fix"? Or could suggest one? I could change it from the value it is now to the local profile - but then I've got to redesign the locked down profile stuff thats going on Tia. a. Gilwood CS Ltd Registered Office : 3 Cedars Crescent, Sunderland, UK, SR2 7SY. No. 6099397 England