XWIS.DLL is a dynamic link library file that allows older Westwood Studios games to communicate with the XWIS online master server. Since GameSpy (the original multiplayer service for many of these games) shut down years ago, the community stepped in. XWIS keeps the multiplayer alive for thousands of retro RTS fans.
Explanation: Because the DLL hooks into network functions and modifies game memory (to redirect server addresses), some AV engines heuristically flag it. This is a false positive.
Fix: Restore the file from quarantine and add an exception for your game folder. xwis.dll download
This is often a rendering issue, not a DLL problem. Try adding -win to your game shortcut to run in windowed mode, or use the ddraw.dll wrapper from CnCNet. This is often a rendering issue, not a DLL problem