I have Windows Vista and it says that it can't support the sansa e260

(http://mp3support.sandisk.com/sansa/Installer/1082/SansaUpdaterInstall.exe)
Try downloading again Heres the link

http://www.microsoft.com/windows/compatibility/Details.aspx?type=Hardware&p=Sansa%20E260%204GB%20FM%20Tuner%20Voice%2FFM%20Recorder%20%20Video%20Color%20LCD%20USB%202&v=SanDisk&uid=SDMX44096A70&pf=0&pi=4&c=MP3%20%26%20Media%20Players&sc=Other%20Media%20Players&os=32-bit

click on this extremely long link :( sorry about that) and read what it says about compatibility and software downloads,

I hope this helps

It is pretty easy. If running Windows just download the Sansa Updater (see link below) and install it.

Then, use the Mac/Linux instructions (even if running windows!) to put the e260 into MSC mode- turn e260 on, switch e260 hold switch to on, press and hold the e260s LEFT button "<<" while you plug the USB cable into the e260.

For me (running Windows XP) the Sansa updater automatically detected the e260 then and updated the e260's firmware.

Links to the updater, and alternative complete instructions for Mac/Linux are here
http://forums.sandisk.com/sansa/board/message?board.id=e200&thread.id=10357

Get the Vista compatible software from Sandisk's website

You should be able to access it as a flash drive straightaway; yes, the Sansa.com site has drivers on it.... But keep searching the web on

1. Vista SP1 Sansa Drive Mount
   

...and try changing the Sansa between USB modes.

Try this: disconnect the player from the computer, hold in the volume + button, and reconnect the player to the computer while holding the volume + button in. Keep holding the volume + button for an additional 5-50 seconds. Windows should eventually go into recovery mode and revive the player- it will pop up a window that says Found New Hardware Wizard.

Go to settings, usb mode and change it to msc. Then it will show up as a drive and you can drag songs to your music folder. I just updated my firmwareand now it's loading in MTP mode so Windows Media Player can load it etc.

U can either use wmp or yahoo music player works or u have to change the files to mp3 or wma files

Have you downloaded the firmware from sandisk?

Also, have you gone to Windows Media Player 11 and tried to sync it?

When you plug the Sansa in, Vista should recognize and the Sansa should show connected. XP should do the same thing.

http://www.sandisk.com/sansa/#/support-0/
This is for the Sansa e200 series
Go to this site: there is a firware update
also, Media Converter (if you do not have it)
User manual
How to videos
More Support information

In the manual it shows that the 4gb is the Sansa e260; is that what you have?

You can also go to:
http://www.sandisk.com/Retail/Default.aspx?CatID=1605
for more information

Does it show up in your windows explorer as another drive letter ?