I'm running Windows 7 Pro on my PC and gf runs Windows 7 home on her laptop. Did not have any problems for the past year until recently. I have an external shared drive (e) attached to the PC. Both of us had users on each others computer and both as administrators. Add 2 regular users on the laptop, still no problems. About a month ago, the laptop couldn't see the e-drive under her user. I remapped it under my user, then switched to hers and it was removed from both. Tried deleting and reestablishing both network and homegroup with no success.
If that wasn't bad enough, we took the laptop with us on a trip and the e-drive. I couldn't see it connected under my user but could see it under hers. I have no idea what to try next.