My source of internet is via mobile tethered to PC. However after 6 months use, the connection has become dodgy so it charges but not making reliable link to PC.

Before I was using Bluetooth rather than tethering, but changed to tethering so it could charge off PC...

My PC at the time had XP and it was simple for me to set up the dial up connection however under vista I can't figure it out... perhaps I'm forgetting a step. I've read for hours on how to do it but something just isn't right.

Can someone please take the time to give me a walkthrough and I will report back with what parts of the process aren't working.