I have an issue with one windows 7 PC where the IO Library 18 & 18.1 did not install properly.
After normal installation you should see small IO icon on taskbar. It did not appear. If I start from executable it can not detect any hardware.
The only indication during installation (begging) that something go wrong is that it show message that it can't update registers and it will need to restart. One you click OK it will continue installation with restart on the end.
If I fold back to IO version 16.3 everything work properly. No issue with installation whatsoever.
The setup PC that I run is 64 bit windows 7 (service pack 1) Dell Inspiron 3647 with Intel Core i3-4130 CPU @ 3.4 GHz with 4GB memory. It also have active antivirus McAffe.
Why the IO 18 have issue with installation?