You've got it backwards. You open the window to let the spirit out, so that it can move on, and then two hours later you close it so that they won't be tempted to return and haunt the place they died and so that they'll move on to their afterlife.
Roughly about 12 times a day{24 hours}
The duration of Joe Somebody is 1.63 hours.
The duration of Somebody is Watching You is 1.4 hours.
The duration of Somebody Else's Coat is 1.05 hours.
Because in the remote past, somebody decided to divide the day into 24 hours. At that time, people liked numbers with many factors.
People were doing a runnathon
The duration of Somebody Up There Likes Me - film - is 1.9 hours.
The duration of Facing Windows is 1.7 hours.
The duration of Windows - film - is 1.6 hours.
Savion is in charge of getting windows painted for his school play. His group paints 15 windows in 90 minutes. How many windows will they paint in 3 hours?
The duration of The House with Laughing Windows is 1.83 hours.
Yes, it is compatible with Windows 7. I installed and have played it for hours and hours.