I've too got a Latitude XT2 and I experienced the same issue when I updated (clean install thoo) from 7048 to 7077.
I found something interessting; There is a service called ntrigserv that points to <<TARGET DIR>\anyserv.exe
- needless to say, it's not pointing anywhere near where it should, so I changed the path to the right directory - and tried to start the service which now successfully started the service - but instantly stopped it again...
further research showed that anyserv is trying to run a program called ntrigwatch.exe.. well.. actually it tries to execute C:\Program Files\N-trig\N-trig Software Bundle\N-trig Software Bundle\ntrigwatch.exe" (note the trailing quote!)
- With or without the quote - the file simply does not exists.
I also checked the signature of the drivers and found that c:\windows\system32\drivers\UMDF\NtrigDigi.dll isn't digitally signed but starting windows in "Disable Driver Signature Enforcement mode" didn't do squat either.
Conclusion; I don't know if the ntrigserv service is what causing the problem - since I havn't rolled back to 7048 - I have nothing to compare with (I'm hoping that 7106 might fix it - but I'm waiting for a english release first).
I've tried to contact n-trig three times the last week (only once about this issue though) but they have yet to get back to me...
... and that throws me off abit.
- Sure, they have no responsibillity to provide support as they are just a hw supplier - but they are saying that it's unsupported by Dell - and therefore (in my opinion) they should take some responsibilliy to help out early adopters... I mean, they do get some great beta-testing for free (yeah - I usually get paid to do this).
... they should at least return my emails no matter the reason.
I'll keep you posted if anythinig develops on my end.
ps. At least It's good to know that I'm not the only one using win7 and XT(2).. I've been googling this issues and come up very short which made me almost believe that I was the only one using/strugling with this system) ds.