Partitioning Question after install...(disk mount error)

[Sennaria]

I have just done my first full linux install totally replacing windows on an old Compaq Presario so I can refamiliarize myself with it and when proficient leave windows entirely.
Actually, this is my second install, as I didn't feel I partitioned correctly the first time opting for using the whole hard drive rather than partitioning.
This time I made the boot, the root, the swap and the home partitions.
I have discovered when I go into my computer and click on the hard drive to open it I get the "can't mount disk location" "can't mount file" error.

Is this an issue that needs to be fixed? I have looked around and seen the other posts but am unsure how to apply in my instance so I apologize in advance for any duplication.

Here is the output of my fdisk -l and blkid

I see one thing, /dev/sda2 seems to be a holdover from the first linux install. (The first time I chose whole partition so it would reformat the whole harddrive (it was originally c:// Windows XP and d://Recovery files. This install I did custom and went in and made the 4 partitions above). Is this(the sda2) possibly the issue and if so should I get rid of it and if so how please?

Disk /dev/sda: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00032427

Device Boot Start End Blocks Id System
/dev/sda1 * 2048 999423 498688 83 Linux
/dev/sda2 1001470 625141759 312070145 5 Extended
/dev/sda5 1001472 586936319 292967424 83 Linux
/dev/sda6 586938368 588890111 975872 82 Linux swap / Solaris
/dev/sda7 588892160 625141759 18124800 83 Linux

jana@jana-KJ384AA-ABA-SR5410F ~ $ sudo blkid; ls -l /media/
/dev/sda1: UUID="f1981d05-1fd9-47f7-917f-b6a05190fd27" TYPE="ext4"
/dev/sda5: UUID="977148b7-4c1a-4457-89d2-27829eef69f3" TYPE="ext4"
/dev/sda6: UUID="a1277ddb-9654-49fd-abd6-50fc6813c934" TYPE="swap"
/dev/sda7: UUID="93f258be-157e-4fa1-a9e4-9e5e11474ea9" TYPE="ext4"

I appreciate any input as I excitedly move forward to learn the environment I can best work in and have always wanted to get into linux and away from windows.