Hello,
Working fine in our end.
Please understand that this kind of issue is not related to the type of computer but just to the data.
Without information regarding what's in your cart ; what you're trying to do (exactly) ; I'm afraid that we won't be able to reproduce the issue.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.