Dead By Daylight purchased but Install button is missing. Help Please !

98 didn't have pinning to the taskbar or that tall of a taskbar without multiple lines of applications. windows 7 had an option to tone down the graphics for older computers, which looked like this. i guess you could call it a skin but it's one that came with it. while setting it up like that could be personal preference, it probably means the computer is older and that's an indicator that it might be 32-bit hardware which is incapable of running this game because it's 64-bit.

you can run 32-bit and 64-bit applications on 64-bit windows (which requires a 64-bit cpu) because it includes both 64- and 32-bit libraries. at any point from cpu to os to application you can ignore the upper half of the registers to do 32-bit on a 64-bit system, but you can't ever add it back.

Unfortunately you're wrong. Steam hides the install button if the game isn't compatible with your system. It's the most likely reason, so check if he has a compatible windows version before you look for possible bugs.