Do not know how to install the ego portable hard drive (iomega). I have put the cable into my laptop but nothing happens.

According to the Iomega Support web site you do not need additional drivers for using your Iomega eGo drive with Windows 7 unless you have a USB 3.0 device.

See this Iomega document on what you should do if your drive is not detected on Windows 7

Iomega Utility are not Specific to the current device.

My iomega ego external hard disk was working properly but when i connected it today the encryption utility show that-Iomega Utility are not Specific to the current device and no any area shown to type password. My drive contains lots of valuable data. How can I acess into my drive. But the virtual drive is shown.

right click on my computer and choose manage.
computer management will appear.
go down to disk management
if you see your ego drive listed there
right click on it and choose change drive letter and paths
choose a drive letter that isn't in use like F or G.
you should now be able to browse or view the ego drive in my computer. or by going to run and type the drive letter you choose.

Have you tried connecting it with the Firewire cable that came with it? (your pc may not have the correct port) or connecting it with a different usb cable?
Has the drive been dropped? it has a protection system which shuts the drive down when it is dropped. you may need to put the HDD into a different caddy or plug it directly into a desktop pc's motherboard to retrieve you data.
I hope this helps.

Yes, because it is a Plug-and-Play device, and because Windows supports Plug-and-Play.

You have to make sure that both the data cable and the power cable are connected to USB 2.0 ports. the power one is marked with a lightening bolt. xp/vista/windows 7 has the drivers in thier data base. so if plugged in correctly then will auto detect.

The user manual can be found at the Iomega website, here is the specific link:

https://iomega-na-en.custhelp.com/cgi-bin/iomega_na_en.cfg/php/enduser/std_adp.php?p_faqid=14432#egoprt

Look at the portable drive section and there is an eGo link to the drive mauals.

Hope this helps.

try to connect it to another computer that runs vista, reformatting is never a good thing. the portable hould be read on any other computer, but if you connect to another computer that have vista take it off and keep it on the other computer for a little (like someone elses computer) and put it back on to the computer with windows 7, reformat it and try to put our stuff back on then try again.

sandisk 2gb is not formateed

a windows update may have run and killed the drivers...try rolling the system back to before the problem started, then if updates run again..and set them to download but dont install..install them yourself..run updates and see if the problem re-appears.