I have been facing this problem ,i tried force stop procedure , but the problem still persists whenever i opened play store in different time intervals , every time i had to force stop it . so i was fed up of doing that and found out the ultimate solution which which would remove this annoying problem forever is by un-installing the updates on playstore and switching back to the basic playstore version which was installed when you first brought your handset.
Believe me , i haven't faced that issue after that . and my playstore is working awesome