USB external mass storage devices doesn't work.

Hey guys,
I couldn't find any answer to my problem so I hope you can help me...
I have USB Seagate external USB drive which was working perfectly with my mac until I installed VMware. The thing is that since first time I installed XP on VMware and unmounted my external drive from OSx and mounted in for virtual machine the drive is no longer visible in Mac OS no matter if I unmount it from virtual machine, plug/unplug from port, turn off VMware, restart macbook in any possible sequence combination. However I can use it easily in virtual machine or on other PC. Problem is not files type related, because I've already checked it, what is more I didn't format the drive and earlier it worked.
What is more now I can't even see my pendrive despite the fact that both Seagate drive and pendrives are visible in system profiler. My USB mouse works perfectly so problem apparently is only with data storage devices.
During the installation an error pop up concerning "IOUSBMassStorage" file but after installation of VMware everything was working until I mounted in on virtual machine.
EDIT: I almost forgot to add that I uninstalled VMware and the problem still occurs.
Thanks for any help in advance.
Message was edited by: bheliom

I was trying to install update USBFamilly and now also VMware again and in both cases I get error saying that USBMassStorageClass was installed improperly.
I found few topics about this file on the internet that it controls exactly what I have problem with but couldn't find solution for how to reinstll this file.
Any ideas ?

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This signature left intentionally blank.

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Hi and welcome to the forums!
GREAT FIRST POST!! Very clear and specific. You don't know how rare that is
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Message Edited by Bifocals on 11-19-2008 08:36 PM
Click Accept as Solution for posts that have solved your issue(s)!
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Hi @Eman_Gamal
Welcome to the HP Forums!
It is a terrific place to find answers.
For you to have the best experience in the HP forum I would like to direct your attention to the HP Forums Guide Learn How to Post and More
I grasp that your USB ports are no longer functioning correctly. When you checked Device Manager under device status you see this message" cannot verify the digital signature for the drivers required for this device".
As they were previously working have you tried rolling back the drive in Device Manager?
Have you ran the HP Support Assistant to acquire any HP updates?
Have you tried using MS Fix it ?
Here is a link to the recommended drivers for your notebook. HP Pavilion dv6-6c45se Entertainment Notebook PC Drivers Please ensure you have all the latest updates installed.
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Using Microsoft System Restore (Windows 7)
Lastly you could do a recover back to factory.
Performing an HP system recovery (Windows 7)
There is an opportunity during the recovery to backup your personal files to prevent data loss. Now is the time to do one if not previously done.
Restoring Files that were Backed Up Using HP Recovery Manager (Windows 7)
At any time you may contact HP support for assistance. They can remotely access your system tto help you overcome difficulties.
Please call our technical support at 800 474 6836. If you live outside the US/Canada Region, please click the link below to get a support number for your region.
World Wide Phone Support
Good Luck!
Sparkles1
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the bottom right to say “Thanks” for helping!

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