norton PC tuneup disc optimization time is elapsing, what do i do?

ok, so ive tried about 5 times now to run a PC tuneup, the only orange mark on the 4 sections of the main norton icon thing. i am not very experienced with computers and need help urgently! basically i click run and it takes me to another box that says time elapsed: 00:18:22 and keeps counting... drive C defragmenting.... disc optimization running ... and the only option i have is cancel...

whats going on? thanks guys!pc.png