Thank you for the additional details.
Could you please let me know more details about the machine you are using to run Test Studio on - is it a physical or a virtual one? What its specifications are?
Next thing to double check would be whether there is an antivirus software active? Please disable it and then try again.
If you have any proxy active please disable that as well and then execute the performance test.
If any of the above is applicable and you still see the same misbehavior please generate the log file again and provide for further inspection.