I found out that the windows creative update do it worse. After uninstalling creative update the problem is still there but only if I open Adobe lightroom. After closing lightroom the period starts working again. Got an windows update yesterday and it was the creative update again!!! Same problem came after an hour or so. Period button stoppet working. After uninstall it if as above. The radeon drivers tells me that I have 17.1.1 and it is a newer version 17.4.4 but if I try to upgrade noting happens. If I try the autodetect it tells me I already have the latest.