
One of the biggest problems with Windows 7 is that the architecture is so radically different to XP as to make upgrading impossible. You can only do a clean install if you want to move from one OS to the newer one. The reason for this is that if Microsoft allowed you to upgrade “in-place”, the resulting OS would be so full of bugs and incompatibilities that it would never work for you. Windows Easy Transfer goes some way to mitigating this, but it will only transfer files and some settings, not programs. This is the important one as a huge volume of people are running older software on XP that they may have lost the installation disc for, or there’s a lot of software that’s fiddly to install, or one of any number of reasons why they will want the software they’ve used for years in XP, working in Windows 7. This brings us back to the architecture problem. Windows 7 is considerably more compatible with older software than Vista was, but not everything will run. If you have a processor and motherboard that supports virtualisation then you can install XP Mode from Microsoft and install your software in that
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