This answer record lists the known issues for the Installer in the ISE Design Suite 14 release.
Each known issue includes a link to another answer record that contains additional information on the issue.
(Xilinx Answer 47771)14.1 Install - Why does the C:\Xilinx\14.1 directory not get removed when running the Uninstaller?
(Xilinx Answer 47037) Install - When installing to a network drive, a pop-up windows states there is not enough space on the drive
(Xilinx Answer 40442) ISE Design Suite - Long path name causes continuous errors