Disk utility error

[macmann]

i noticed that my computer was having occasional hiccups when running multiple programs. i immediately ran the disk utility and tried to verify the disk. it came up with an error saying:

incorrect block count for file Steam_2011_09_18_14_02_16_833.mdmp

(It should be 0 instead of 13)

then a few other messages stating what it was checking then at the bottom it reads:

The volume Macintosh HD needs to be repaired.
Error: Filesystem verify or repair failed.

its been bothering me and i would appreciate any help
thank you

 

[harryb2448]

G'day and welcome to the forums.

You need to boot from your system disc or Recovery in the case of Lion, and go into Utilities > Disk utility > Repair Disk.

Helps enormously if you provide computer and operating system details.