Ok, first of all a lot of folk will be aware of this already. However, I wasn't and thought it might help some folk here to recover some drive space on your OS SSD. Mine is a 60Gb Vertex and I was getting a bit low on free space recently so did a bit of housekeeping, cleaning up a bloated My Documents folder etc.
However after Googling it, I found a simple tip that as I said I certainly wasn't aware of. I managed to grab 5 Gb of space back with just a few minutes work. I'll just quote from the article I read this on, hope it helps some folk.
However after Googling it, I found a simple tip that as I said I certainly wasn't aware of. I managed to grab 5 Gb of space back with just a few minutes work. I'll just quote from the article I read this on, hope it helps some folk.

Not only do the NVIDIA drivers not clean up after themselves, they actually create two copies of installation files in different directories on your C: drive. The first are easy to find: after upgrading an NVIDIA driver, old versions are left in a folder called C:\NVIDIA, helpfully marked up by version numbers. These are obvious and easy to delete; for each one that you blitz you get back about 150MB of space.
The second copy is harder to spot. During installation or upgrade the compressed drivers unpack themselves into another directory at C:\Program Files\NVIDIA Corporation\Installer2 before copying themselves over to Windows’ system folder. Then they leave them there in a complex structure of files and folders that looks too intimidating to delete.
In just a few months of updates, this folder had grown to almost 2GB in size for me, making 4GB total with the C:/NVIDIA folder. One click will purge the entire Installer2 file, with no adverse effects on performance.