Simply Checking runs on the following :
Microsoft Windows 32 and 64 bit operating systems : XP Service pack
Windows 7 and Windows 8
To determine which XP service pack you have :
1) Left click
the 'START' button
2) RIGHT click 'My Computer'
3) Left click 'Properties'
To determine if you are running
32 or 64 bit :
Windows XP :
From the start menu RIGHT click 'Control Panel' then left click
Properties. If it doesn't say it's 64 bit then it's 32 bit
Vista + Windows 7 :
From the start menu
click 'Computer' then click 'System Properties'
look at System Type to see whether it's 32 or 64 bit
Windows 8 :
From the metro UI click on the Control Panel Tile, then click
System + Security then click System to see whether it's 32 or 64 bit