Hi Walter,
Probably the best advice if your having that many issues with USB Thumb Drives is to make sure you purchase Brand Name drives so the drivers are easily found or Microsoft has written them or stop using Thumb Drives and purchase a 1-2TB HD for less than $100
to save yourself the grief. Last always leave the auto updates on Service Pack 1 for Windows 7 has been out for about a year and a half now...
Cheers,
-Ivan
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