I've read your 1st post and later and no info of the PC being used here. All you're doing is cherry-picking a possible solution but you really need to provide the details. It won't hurt to tell us what is involved here and the nature of why the old PC was put aside if known. Otherwise, if you can't get anything going then all that's left is a total system restore/recovery from discs or partition. Also, if you never created the "Win 7 repair disc" that should be done from another win 7 based OS of same type 32 or 64-bit and class; Home Premium, etc.. Otherwise all the fixes are going to be hit and miss until you provide the details.
tada -----Willy 