ok firstly relax. Driver cleaner hasnt changed your operating system.
What you are seeing is merely the fact you no longer have a full nvidia graphics card driver installed. Your OS isn't "changed", the lack of aero functionality is due to the fact there is no video driver installed. This is also why the resolution is so low and you are seeing everything "big".
Download the latest nvidia driver for your system at
Welcome to NVIDIA - World Leader in Visual Computing Technologies then restart your computer.
169.25 for 32 bit vista is here
ForceWare Release 169 - then mod the inf from laptop2go if you want newest sets (please be aware you may lose hotkeys).
Right click on "my computer" or whatever you have named the PC. then go to properties. then click "windows experience index". and "update my score".
with the nvidia drivers installed you will now have hardware acceleration and windows will enable aero again.