I'm Having The Same Problem With My S600. I Had To Change My Motherboard And Re-Install My XP And Once I Did It Flat Out Refuses To Recognize My Camera. I Have A Sony Dsc-P71 And While It's Older It REcognizes That No Problem. I've Installed The Motion Browser From The Disk That The Camera Came With But It Doesn't Have Anything That'll Make My Computer Recognize It. Have You Tried Switching It To Either The Picture Bridge Or PTP Setting While Plugged Into The USB? My Computer Will Recognize It And Will Try And Install the Driver For It But Will Say My Datas Invalid. Maybe It'll Work For You. When Plugged In Just Press The Menu Buttton And OK And Switch It From Auto To Mass Storage, PTP Or Picture Bridge. Lemme Know If It Works. If You Don't Have The Disk That Came With The Camera, Maybe I Can Send The Files TO You In A Zip File Or Something If You Want.
I am using WinXP with all the latest updates. I have a Sony DSC-S600 camera that we connect to USB ports to transfer pics. Out of the blue one day, the Windows stopped finding it when the usb cable was plugged in. It also will not find the usb external hard-drive or mp3 player. The printer, keyboard and mouse are all fine on the ports. I have deleted the USB from device manager, but still no recognition of removable media. Tried them on our laptop, same problem. Sent the camera to sony, and it worked fine for them. We use Advanced Windows Care program on both to clean up stuff. Could this have done something to the ports? If so what do I do to undo? Windows system restore will NOT restore to ANY point I choose - even working under safemode.

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