i want to defrag my c drive when i click on defragment icon it says that (disk defragmenter cannot defragment this read-only volume (C:)
how i can solve this problem can any body know regarding.
many thanks in advance
You may not have admin privileges on that system. Normally the Defrag program will run regardless of which volume it is.
Just download another disk defrag tool. Copy and paste the link to your browser and on the option 4 is the place to download the tool that works way better than windows built in one.