Sorry for misunderstanding - when I said I 'moved' downloads folder I meant I changed it's path to a preferred download folder.
To revert back to 'Trusted Installer' what do I type in to command prompt?
And to answer a previous question - yes my Win ver is a 64 bit.
And to answer another previous question - no I hadn't thought of putting a bigger HDD in my laptop because I didn't think that could be done in a laptop. There is space to have another 4GB put in but that's all so I didn't think it was worth the expense for such a small amount of extra memory. As far as I can tell the micro SDXC card is the best option because it gives me an extra 64GB of memory. I just have to learn how to redirect downloads to the micro SDXC card in drive D:/
I purchased this laptop for study only and wasn't too concerned about memory because I have 1T of cloud storage for all my files. However I didn't realise just how small the memory was because it's nowhere near enough just to download all the software I need for my studies.