I had to do away with all the Sony pre-installed software! I backed up the activation certificate and license key of the pre-installed Win 7 Home Premium and installed a clean copy of Win 7 Home Premium, which you can download from Digital River...
You can do a completely clean install of the Windows that comes with the laptop (using the recovery disks or the recovery partition) and it will be auto-activated. As you noted with your method (which is the same result, just more effort) the laptop doesn't work properly and you have to install a bunch of drivers and tools from the Sony support page.
Even better using the recovery disks / recovery partition, it is possible to do a "semi-clean" install which will be the clean Windows plus all the necessary drivers and tools
but none of the crapware (or only those bits you might want).
Details on this are in this thread over at notebookreview forums:
http://forum.notebookreview.com/sony/146033-how-optimize-any-sony-vaio-semi-clean-install.html
Note that the thread was started some time ago and you have to adapt the method in the first post to keep it up do date, so you'll need to read the last couple of pages or so. The good news is that the guy who updated the method, Mythdat, is a Vaio E owner so his info is directly applicable.
Mythdat is also active in this owners thread:
http://forum.notebookreview.com/son...538-official-vaio-e-series-owners-thread.html
Which contains loads of useful info.
I'd strongly recommend any Vaio owner to make the recovery disks, even if they are going to use a completely different OS altogether. Being able to go back to the default Sony installation is useful for troubleshooting.
I've always wanted to put an SSD into a laptop.
I recommend it wholeheartedly. I stole the 256Gb Crucial C300 out of my desktop (which already has an 80Gb G2 Intel for the OS) and stuck it in my Vaio S - which is now a little stormer.
It was a blue 14" Vaio E that led me to the S. I really liked that laptop, even the colour (not a million miles from that of this forum), but decided on something even smaller and more suitable for an old fart.