Windows 10: can anyone help me to be able to make "extend volume" not greyed out please??

I am trying to free up space on the C drive which it states is almost full - there is nothing much in any of the areas except apps - I do not know how to get rid of more ie I don't know what I can get rid of - but on D drive there is nothing - I have googled and found that I may be able to extend volume in disk management but this is greyed out - I have run as administrator - and at first it was just a black screen - but now it is there to a fashion but I can't type anything in the search box at the bottom and the start button does not work - which it does normally. Anyone help me with this pl

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Extending volume problems

I cannot extend my volumes in Disk Management or diskpart.exe, the option is greyed out. Is it because the partition is at the end of the disk? If so how to fix?
The attachment has a screeny.

 

extend volume button greyed out

hello,i just reformat my hp laptop that has a Toshiba hdd drive,

but the problem is that i found that my hdd drive was sliced into two partitions,now if i go to disk manager then delete the partition that empty, then go to extend the volume of my c drive the extend volume button is still greyed out,i have Windows 10 pro,

8gb ram,

Intel Core i5-6300U processor,

Intel HD 520 gpu

i would appreciate some help, thanks !

 

Can't extend volume

Hi. I have a 500 GB drive with 2 partitions "D" and "E". OS is win10.
Have been trying to use the Extend Volume Wizard combine them to one drive letter.
But it won't work! I right click on "Extend Volume" and Next but there's nothing listed under Available or Selected and Next is greyed out. Its the same whether I start this on D or E.
Is this what's meant to happen (nothing???) or have I missed something?