by Aivars » Mon May 25, 2015 11:44 am
For starters there are 2 types of Windows - 32bit and 64bit. 32bit applications will run on both while 64bit applications will only run on 64bit Windows, and for this reason screensavers are 32bit applications.
On 32bit Windows there is one system folder - system32 but on 64bit Windows there is system32 which (confusingly) is used by 64bit applications and SysWow64 which is used by 32bit applications. So if you really want to install screensaver to system folder, use SysWow64 on 64bit Windows and system32 on 32bit Windows.
All of this is very complicated mostly thanks to the Windows design, so we suggest to use a different folder (Windows or Program Files) instead.
Blumentals Software Programmer