I was trying to play Xcom2 but...

I was trying to play Xcom2 but in my computer runs so fast that is unplayable so please someone help me...

Look at DOSBox, an excellent MS-DOS games emulator, might help you, as it's listed as XCom2 compatible
It's a Windows cmd program, so you might like a frontend like D-Fend, RobyDOSBox, etc
Get them all here :)

well I have another problem now it runs so slow that I fall asleep what should I do? :(

I find the speed buttons in Ctrl F8 and Ctrl F12 anyway thanx! :D