No this does not happen to everybody. As I remember I tried to point out when Xolox uses the most of you computer's resources. In that way, if your computer was exaggerating Xolox's normal resource usage, that would be the most likely time that your computer would have problems. When Xolox is trying to connect to new hosts many users may notice a slow down in their system. Additionally, because of intigral problems in Windows, such as memory leaks, if you computer has been running constantly for a while (depends on the machine) your computer may stop responding until Xolox connects (which in that case takes longer). Try rebooting once in a while if you do not do so very often.