You Have WMWare And Your Orginal Windows Ok ?....
Follow This Steps Man :
1)Open New Windows Which You Setup it in WMWare
2)Open S4 As Admin (If You SetUp Win7 Or Vista)
3)Start S4 As Admin In You Orginal Windows (If You Win7 Or Vista )
4)Enjoy With Multi Accounting

And If S4 Game Dosen't Work ...
You Must Upgrade Your Rams Or Prosseccor ....
For Any Error Pm Me

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Click Thanx If i Helped You