I don't really know, but I doubt it very much.

BT on both the IT and a PC are designed as hosts for various BT devices, not peer network end-points. One, or the other, or both, would have to implement a BT profile (protocol stack) that does what you want and I don't think either the tablet or the PC knows how to do that out of the box.

I am not sure what your end objective is here, but if you cannot use a wifi access point then have you considered just using a wifi USB dongle in your PC and then using ICS on the PC to get to the Internet?

However, wifi routers and access points s are so cheap now that I don't really see the point in not using one.