Win 7 64-bit stopped reading All FAT32-formatted USB drives

December 19, 2011 at 03:58:06
Specs: Windows 7, 8gb
Suddenly all Fat32 devices i.e camera, pen drives, phone etc will not read on PC (w7 X64), all NTFS devices are fine. They appear in my Computer and when try to access it says you need to format to read disk. I have tried formatting but it fails. All these devices work fine on my laptop W7 X86. In paragon they show up as RAW data. Might have happened after a virus got on PC.
Things I have done is run virus scanner, malware cleaner, re-install usb drivers but nothing work.
Any ideas please

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December 19, 2011 at 04:21:42
I would re-install Windows using the "repair Windows" option. This is the option after you select to install Windows, not as the disk first starts and offers the repair option from the menu.
You may or may not have this option available depending on the version of Windows you have...retail, OEM, etc.

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December 19, 2011 at 15:50:15
Improper removal of external USB storage devices can corrupt the formatting. If you need to recover data then try repairing the partition by using testdisk.

If you don't care about any recovery, then delete the partition and then recreate and then format.

Get testdisk at the link below. Be sure to read all the tutorials prior to use for best results.

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January 1, 2012 at 01:34:31
Hi Thanks for replies.
I managed to fix this eventually for anybody else that has same concern.
It turns out my fastfat.sys file was corrupt possibly from virus which was stopping all Fat32 files from working.
I repaired this from cmd prompt inside of windows using sfc/scannow.
Checked the logs at windows/logs/cbs/cbs.txt is showed file was corrupted and repaired. Rebooted and everything is OK

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