Doom collectors edition triology installation problems

[doomprobs666]

tried runnin it 3 times. keeps givin me this thing that says the program cant start cuz DPLAY.dll is missing from your computer. try reinstalling again, i didi 3 times and nada. can u help?

 

[Hawkeye22]

Did you try running the installation program as administrator using the "run as" command? After installation if you're still having problems, try switching the compatability mode to WinXP.