I was not being patronising, I think for a new computer user, suggesting they dont delete anything until they know what they are doing is good advice.
I also asked if he was low on real memory, or hard disk memory.
If it is a new PC I would be surprised if it was low on hard disk memory as most PCs now come with very large hard disks.
And dont say "as usual I am not very helpful". I have lost track of the people who have thanked me for helping them fix their computer and technical problems on this site.
Suggest you look at this below as an example, EIGHT very technical answers to the one comlex question.
http://www.theanswerbank.co.uk/Technology/Ques tion337308.html