Coolpix 4300 needs driver & update for vista (by 3 users)

You can download PictureProject software from this address: http://chsv-soft.nikon-image.com/jpn/software/win/S-P2____-175WU-JPNJP.exe

That is the only Nikon software that supports Vista since your camera is "outdated".

Here is a quote from Nikon site:

• We had released a Windows Vista-compatible version of PictureProject, v1.7.5, for use with the models listed below, and all models that followed. PTP (models supporting the PTP protocol) and Mass storage USB transfer options can be used for camera connection. However, the camera's transfer button can not be used to transfer pictures over a PTP connection. Set the USB transfer option to Mass storage to enable the camera's transfer button.
  Currently, the new Nikon Transfer and View NX will replace Picture Project as our new Image Transfer and Browser applications. These applications support the same Nikon products as Picture Project.

COOLPIX P4, COOLPIX P3, COOLPIX P2, COOLPIX P1,COOLPIX S10, COOLPIX S9, COOLPIX S8, COOLPIX S7c, COOLPIX S7, COOLPIX S6, COOLPIX S5, COOLPIX S4, COOLPIX S3, COOLPIX S2, COOLPIX S1,COOLPIX L6, COOLPIX L5, COOLPIX L4, COOLPIX L3, COOLPIX L2, COOLPIX L1/L101,COOLPIX SQ, COOLPIX 8800, COOLPIX 8700, COOLPIX 8400, COOLPIX 7900, COOLPIX 7600,COOLPIX 5900, COOLPIX 5700, COOLPIX 5600, COOLPIX 5400, COOLPIX 5200, (COOLPIX 5100), COOLPIX 5000, COOLPIX 4800, (COOLPIX 4600), COOLPIX 4500, COOLPIX 4300, COOLPIX 4200, COOLPIX 4100, COOLPIX 3700, COOLPIX 3500, COOLPIX 3200, COOLPIX 3100, COOLPIX 2500, COOLPIX 2200, COOLPIX 2100, COOLPIX 2000,COOLPIX 995, COOLPIX 885, COOLPIX 775.We do not plan to offer compatibility for COOLPIX 990 OR COOLPIX 880 connection to a computer with Windows Vista preinstalled. Use a card reader or card slot to transfer images.