Hi,
there could be an option to go back to Windows 7, through: https://support.microsoft.com/en-us/instantanswers/1235b5b0-bf94-4b77-9cbd-1c1a8337070c/going-back-to-windows-7-or-windows-8.1
But I guess this is not what you want.
In that case, I would follow the steps previously provided:
Windows 7, Windows 2008, Windows Vista (32-bit operating systems)
Start Windows Explorer: Right-click the Start button and select Open Windows Explorer.
Delete the following directories. Note that these are the default locations.
C:\Users\user-ID\AppData\Local\SAS
C:\Users\user-ID\AppData\Roaming\SAS
C:\ProgramData\SAS
C:\Program Files\SASHome
Windows 7, Windows 2008, Windows Vista (x64 operating systems)
Start Windows Explorer: Right-click Start button and select Open Windows Explore.
Delete the following directories. Note that these are the default locations.
C:\Users\user-ID\AppData\Local\SAS
C:\Users\user-ID\AppData\Roaming\SAS
C:\ProgramData\SAS
C:\Program Files\SASHome
C:\Program Files (x86)\SAS
Delete the following registry entries if they exist.
Warning:
SAS is not responsible when you edit the Windows registry: changes in the Windows registry can render your system unusable and require that you reinstall the operating system. Always back up your registry before you make any registry changes. For assistance, see Windows Help, Microsoft documentation, or the Microsoft Windows website.
Open the Registry Editor dialog box: Click Start and type regedit on the Run line or in the Search Program and Files search box.
HKEY_LOCAL_MACHINE\SOFTWARE\SAS Institute Inc.
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\SAS Institute Inc.
Reboot your PC. Log on with the local administrator account that was used to perform the original installation or as an administrator. See SAS Note 5055: "Administrator of the machine versus being part of the administrator group."
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