was the 500gb drive partitioned or was not all the space used?

dont bother compressing drives, it hits on your perfomance.

I would reinstall win7 onto a spare borrowed (40gb would do fine) drive, set up the 500gb drive as a slave and copy all your files across. When your happy with the way your computer, clone the contents of the disk onto your 500gb drive.

ask a new question with how to copy the disk across with a tip of $3 if you need help and I would be happy to help you with this. :o)
Source(s):
me!

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From the sounds of it, you can't get to the boot screen, so anything done must be done before that. When booting, after several times of failing boots, you should get the option to boot using "last known good settings". From there, your machine will hopefully boot. If it does, try restoring your system to an earlier time and see if that works. With some luck, that will fix everything.

Good luck!!
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Hi, if you haven't already fixed it, try this..

Boot from your Windows 7 disc and select Repair your Computer, then go to Command Prompt.
In the command prompt, run the following commands by typing them and pressing enter for each line (type them without the numbers) (Assuming C: is the drive windows is installed on)

1. c:

2. expand bootmgr temp

3. attrib bootmgr -s -r -h

4. del bootmgr

5. ren temp bootmgr

6. attrib bootmgr -a +s +r +h

Reboot.

Then reformat your partitions so that windows 7 can see them, by clicking 'delete' and then 'new' (for each partition - they will all say primary) in the format/partition options.
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I tell you how to do:

1>use your pc to connect the hard drive,
2>click my computer in desktop.
3>right click the partition from your sister hard disk,select Properties.
4>uncheck "Compress drive to increase space available".
5>Then close all windows to restart the computer. and you will see its volume become 500GB again.

pls refer to the following link.
good luck to you.
Source(s):
http://en.kioskea.net/faq/sujet-4525-windows-vista-and-7-bootmgr-is-compres...

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