.. , but have the old hard drive that i mined on installed ..
Did you just plug your old HD into your new pc and used it as an additional (non-main) HD? Or did you wipe it before?
Or are you using your old harddrive as your main (OS-) harddrive? Its crucial to know how you 'handled' those drives the whole time.
If you are serious about the recovery of your files and you already
deleted them from your HD, you should stop using the HD containing the files immediately.
You would have to plug your HD out and 1) back it up, then 2) try to recover any deleted files concerning your wallet (do you remember which you were using? Bitcoin Core?).
1) The best would be to use linux on a portable device you boot from, afterwards copying your whole HD (e.g. with
https://wiki.ubuntuusers.de/dd/) and only work on the copy!
2) Preferably a write blocker (software wb:
http://www.forensicswiki.org/wiki/Write_Blockers#Software_Write_Blockers together with any forensic tool (e.g. FTK:
https://accessdata.com/products-services/forensic-toolkit-ftk)
Downloadable here:
https://accessdata.com/product-download/ftk-download-page/