the Zen of Communication.

Windows 7 will install a hidden 100mb partition at the front of your drive when you do a clean install.  It uses this for system recovery if your install goes belly up, and/or bitlocker headers for drive encryption.

I need neither.  And the kicker is some apps (like TrueCrypt) don’t function correctly with the 100mb partition.  In fact, TrueCrypt CAN’T encrypt your system drive because the bootloader is on the other partition.  Not very helpful.

MyDigitalLife shows how to work around this – http://www.mydigitallife.info/2009/08/20/hack-to-remove-100-mb-system-reserved-partition-when-installing-windows-7/ .  See part three, “Method 3: Trick to Remove 100.00 MB System Reserved Partition During Setup” .

In a nutshell, when you’re installing Win7 (note, if you’re reinstalling, this will erase your data, no two ways about it) and you reach the portion allowing you to select your partition, erase your existing 100mb system partition, and your existing OS partition.  Then pick the freshly unallocated space and tell it to install there.  It will say “We’ll create a hidden system partition for your protection” – say OK.  Now delete the new OS volume – not the 100mb partition. Yes, delete the new partition it created for your OS.

You should have a 100mb system partition, unallocated space, and maybe another partition for your data, if that’s how you roll.

Next select the hidden partition, and click Extend.  This will allocate the rest of the unused space (from the system partition you just deleted) to the hidden partition – giving you a single OS volume with no hidden partition.

Ta-da.

Thanks MDL – saved me some headache there.

Note: this trick only works during reinstallation of Windows.  They have a couple other hacks to remove the hidden partition after you’ve installed, but they didn’t suit my purpose.  AGAIN: THIS WILL ERASE YOUR DATA. Don’t cry to me if you didn’t back it up.

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