I often find that after spending hours figuring out something, I'll forget the solution in a few months, or even weeks. It seems to be a good idea to jot down the fixes somewhere. Hence this blog. Some of the things here might be silly, in which case your comment is always welcome.
In Windows registry, under HKEY_CURRENT_USER\Software\SimonTatham\PuTTY\Sessions\WinSCP%20temporary%20session add DWORD value X11Forward, set value to 1.
