That story of unresponsive browser is not an old story for me, because personally I've already encounteres this common problems, and I do believe that it caused the betting games to be problematic; possible errors could happened. However power breakdown soecialky computers were very likely to have these certain concern specially if you don't have any ups, automatic betting games will likely to fail of it's running time as well as network response. For this situations of unpredictable problems to happen, the most important thing to do is be calm and have patience and make you are also provided with power back-up unit like what I've said a ups.
Try to clean your temporary files of your PC by typing %temp% in windows>run before opening your browser. If your PC ant handle your browser then try some lightweight browsers like maxthon. I am sure it will help you out for sure. Rest of the details is already been given to you by baryom.
Cheers
moooonu