http://www.stormcam.org/garmin-forerunner/
How do you connect garmin forerunner 305 to pc?
I am trying to connect my garmin forerunner 305 to my pc for some software updates. I have downloaded and installed the necessary driver. When i connect the device to my computer, windows recognizes that there is something there but can’t find the driver to complete the installation of the device. Any ideas? I have tried different PC’s and have restarted my computer already.
I helped set up a friend’s Garmin and never had the problem you are experiencing.
Here are some things to keep in mind however:
Here is the Product Support number for Garmen, however to see if they can help you out. GOOD LUCK! 
Product Support
(for all Garmin products
except Apollo aircraft)
– Monday – Friday
- 8 a.m. – 5 p.m.
Central time (closed holidays)
- 1-800-800-1020
- 1-888-442-7646
or
- (913) 397-8200
Garmin Forerunner 405