I had a similiar experience this thursday. I scored a 23 in verbal, altough I did a 45 in the last mock exam, and my worst score was a 35 in verbal before I started studying. But it was the same for me, I had to click several times to chose an answer, I got frequent windows pop ups that the Secure Browser is frozen, and the proctor distrubted me three times; he asked me twice to change my web cam and once to show my room during the quant section. However, for the quant part I got a 46, which shocked me because the last few days I did much better with verbal questions than with quant. Also, the proctor seemed so unfriendly, during the check-in he asked me to show my room and talked with me, but then he went silent for 10 minutes. I thought, ok, he is gone and wanted to close examity etc but in that second he replied again. In my opinion, GMAT is now a joke, and I am thinking about not attempting it again. Maybe I do the GRE instead.