C drive almost full- Laptop Win 8.1

[lostkid69]

I installed win 8.1 about 2-3 months ago,but i just started to realize my C drive is almost full, I lagg in games ,and my pc just got very slow overall. I defragmented my ram,scanned my system,tried everything but couldn't find out what is taking all my space on my main drive (C). Every program even the WinDirStat says I only installed 38.9 GB data but my computer says that i have 6.60 GB out of 80.0 GB..I couldn't find a solution on the internet ,so my last hope is this community.
My system specs are:
AMD A8-5550M
4 GB DDR3
Radeon HD 8670M
500 Gb Sata

Here are some pictures: http://tinypic.com/view.php?pic=abhxsj&s=8#.VMmOGGjLcrE
http://tinypic.com/view.php?pic=2ldknmc&s=8#.VMmOfmjLcrE

 

[smorizio]

if you updated from older windows 8 to 8.1 there going to be 4 or 5g of old windows files plus updates and restore points. I would go under system tools first and clear all restore points and then use ccleaner or another program to clean up old windows install files. also uses windows disk managment make sure your drive size is read right and you have one main partion and the system restore.

 

[lostkid69]

if you updated from older windows 8 to 8.1 there going to be 4 or 5g of old windows files plus updates and restore points. I would go under system tools first and clear all restore points and then use ccleaner or another program to clean up old windows install files. also uses windows disk managment make sure your drive size is read right and you have one main partion and the system restore.

I freshly installed my windows 8.1 I had windows 7 before that. I used Advanced System Care by Iobit to clean all my junk files. Also i used disk managment and it says the same,ill attach a photo : http://tinypic.com/view.php?pic=19a7io&s=8#.VMmSmmjLcrE

 

[smorizio]

on that last image you can see your error. when you installed windows or sometime after you made to partition on the same drive. 80g c drive and then rest is e. your best bet is back up your personal files then boot from the windows installer cd and wipe all the partions from the drive then reboot. then rerun the windows installer. make one large drive and have one system restore partion. there are 3 party commands you can google and 3 party programs to try and remove the g drive and make c larger. it may work or may cause you more issue.

 

[lostkid69]

i accidentally voted best solution,this didn't fix it. anyone who thinks can help me plz do it im desperate