The quirkbot is very often marked as unknown device in device manager on WIn 7 Packard Bell computer i5-460M .as not plug and play device COM3 and no quirkbot when programming, and also, suddenly often supressed just after a successful program, with chance, after many tentatives, and many many reinstalling !!.
It is random, many times wrong, I have tried several times all your advices on your site : installing,again and again, reset, plug in USB putting before on on or either on off,, i.e. being very careful on details not written on your site, which could have some effect, like when pluging in USB the quirbot already on on , which looked working better sometimes !!
For reset you do not indicate that it is necessary that quirkbot must not be unknown device, and if the already charged program is supressed in a reset ??
If it is the case, I have nevertheless never been able to reset, a reset , keeping a simple program, led and servo with rampwave, working before with quite a chance !!
It would be good to give quite more details that are completely missing, in particular for beginners and kids, with easily wrong unwritten ideas.
For example, Chrome is hanging if we put on off the quirkbot, that, at beginning, happened to me because the charging light gives the feeling that it is on on, and in this case Chrome cannot be closed as long the quirkbot .remains on off !!! It would be good to indicate this.
I does not like as Google application , not free browser, which can be hanged.
It could be some effect of USB voltage transients giving random effects ??
I can try to help you to improve and write in French the basic informations..