User-801366587 posted
Hi,
Are you installing it with Web Platform Installer or with direct msi file? if your installing it with direct msi file try with WPI. If you still face the problem with installing. Trick to install optimization tool kit is
Open Regedit > HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\InetStp
Edit "MajorVersion" and set the "DECIMAL" value to 9
Hit F5 while in Regedit
Install optimization tool kit.
Change the "MajorVersion" back to "DECIMAL" value of 10
Hit F5 while in Regedit
Close Regedit
This is the trick which we use
Mark as answer if this helped you