Tier 4 to PSW Visa

I have completed my MBA in the UK in 2010 and applied for PSW which I did receive but I didn't go back to the UK so my PSW visa was wasted. I would like to know if I go back to the UK as a student can I apply for PSW again after completing my studies

The rules for the Graduate Immigration Route have not yet been laid before parliament and incorporated into the immigration rules. This is unlikely to happen only shortly before implementation next Summer.

So we do not yet know some of the fine detail, including whether having previously used one of the UK post-study work schemes (IGS, SEGS, FTWISS, Tier 1 PSW) will mean you cannot participate in the Scheme.