Hi Kitionel,
After installing the update, go to your time in the bottom right hand corner and right click the time, and on the menu, select change date/time option. Then in the screen shown (window#1) what does that show for timezone? If the daylight is switched on it will show the time when it will click over. Usually you have to then select the timezone button, (a new window #2 shows), change the timezone to something else and then back again. Close the window #2 and check what it now says. My fix prior to windows update was to change some parameters in the registry using regedit program. I can tell you what but lets leave that for first time as registry changes can be risky.
I noticed that sometimes I had to reboot the computer twice as the old value is read prior to the change applying. The second reboot will read the new value.
Regards, Peter