Problems creating account on Win 7 ultimate

I could easily install Jami on my Win7 64 Pro computer, but on my sons Win7 64 Ultimate we always get the following message, while after we entered his accounts name and password (even omiting the password did not help) :

Jami.exe has stopped working
-> Check online for a solution…
-> Close the program

Problem signature:
Problem Event Name: APPCRASH
Application Name: Jami.exe
Application Version:
Application Timestamp: 5fd25c5b
Fault Module Name: Jami.exe
Fault Module Version:
Fault Module Timestamp: 5fd25c5b
Exception Code: c000001d
Exception Offset: 0000000000001866
OS Version: 6.1.7601.
Locale ID: 4103
Additional Information 1: ac0f
Additional Information 2: ac0f5292caf34caf185860f5640612fa
Additional Information 3: fe3c
Additional Information 4: fe3c5cd618b4a82967f772af3cfc1f92

Any ideas what’s wrong ? As Win 7 Ultimate is running in a multi-lang mode (german,english & french) could this cause problems for Jami ?

TIA, Joe Herrmann

Hi @JoeeoJ, thank you for taking the time to include the error message here. Is this the output you got by running Jami with the -d flag (e.g. Jami.exe -d from the command prompt)?