Hello this might have come up before but I already tried this method:
Insert the installation DVD in your system and start the pc above.
Click Repair your computer.
Then click on Load
Driver.
Go to Computer.
Right click on the partition your installation previously compressed> Properties.
Then uncheck "Compress drive to increase space available".
Then close all windows to restart the computer.
It was already unchecked

. So now have no idea where to go next. Can anyone help?
BTW i had XP installed on one partition and I installed Windows 7 on another. The other partition was running Vista before i did a clean Win 7 install over it and then the problem started