Undoing new partition help please/

I need help partitioning (actually undoing a partition on) my hard drive. I used the freeware app Paragon Partition Manager 9.0, a nice program, but it made my C partition to small, only 20gb. I tried the recovery disc but it won’t recognize my USB mouse or keyboard from DOS mode. Is there something else I can try? Maybe another freeware app that will let me re size without losing data?
Thanks,
Don

 

Easus will let you resize in the freeware. You have to have unpartitioned space adjacent to the partition you want to enlarge.

I'm not sure what you did with Paragon but you may have to delete the partition next to C: to be able to resize C:.