computer slow. Disk utility will not fix problem.

Verify permissions for “Macintosh HD”
Reading permissions database.
Reading the permissions database can take several minutes.

Permissions differ on "Library/Application Support/ProApps/Internal Plug-Ins/BrowserKit/iLife.bkplugin/Contents/CodeResources", should be -rw-rw-r-- , they are lrw-rw-r-- .
Permissions differ on "System/Library/PrivateFrameworks/BrowserKit.framework/Versions/A/CodeResources", should be -rw-r--r-- , they are lrw-r--r-- .
Permissions differ on "System/Library/CoreServices/Front Row.app/Contents/CodeResources", should be -rw-r--r-- , they are lrw-r--r-- .
Permissions differ on "System/Library/CoreServices/Front Row.app/Contents/PlugIns/DVD.frappliance/Contents/CodeResources", should be -rw-r--r-- , they are lrw-r--r-- .
Permissions differ on "System/Library/CoreServices/Front Row.app/Contents/PlugIns/FRSettings.frappliance/Contents/CodeResources", should be -rw-r--r-- , they are lrw-r--r-- .
Permissions differ on "System/Library/CoreServices/Front Row.app/Contents/PlugIns/FRSources.frappliance/Contents/CodeResources", should be -rw-r--r-- , they are lrw-r--r-- .
Permissions differ on "System/Library/CoreServices/Front Row.app/Contents/PlugIns/Movies.frappliance/Contents/CodeResources", should be -rw-r--r-- , they are lrw-r--r-- .
Permissions differ on "System/Library/CoreServices/Front Row.app/Contents/PlugIns/Music.frappliance/Contents/CodeResources", should be -rw-r--r-- , they are lrw-r--r-- .
Permissions differ on "System/Library/CoreServices/Front Row.app/Contents/PlugIns/Photos.frappliance/Contents/CodeResources", should be -rw-r--r-- , they are lrw-r--r-- .
Permissions differ on "System/Library/CoreServices/Front Row.app/Contents/PlugIns/Podcasts.frappliance/Contents/CodeResources", should be -rw-r--r-- , they are lrw-r--r-- .
Permissions differ on "System/Library/CoreServices/Front Row.app/Contents/PlugIns/TV.frappliance/Contents/CodeResources", should be -rw-r--r-- , they are lrw-r--r-- .
Permissions differ on "System/Library/PrivateFrameworks/BackRow.framework/Versions/A/CodeResources", should be -rw-r--r-- , they are lrw-r--r-- .
Permissions differ on "System/Library/PrivateFrameworks/ProKit.framework/Versions/A/Resources/LeopardPanels.bundle/Contents/CodeResources", should be -rw-r--r-- , they are lrw-r--r-- .
Warning: SUID file "System/Library/Filesystems/AppleShare/afpLoad" has been modified and will not be repaired.
Warning: SUID file "System/Library/PrivateFrameworks/DiskManagement.framework/Versions/A/Resources/DiskManagementTool" has been modified and will not be repaired.
Warning: SUID file "usr/sbin/pppd" has been modified and will not be repaired.
Warning: SUID file "usr/sbin/vpnd" has been modified and will not be repaired.
ACL found but not expected on "Applications/Utilities".

Permissions verification complete

All normal responses when repairing permissions. Is there a question that you have otherwise about the machine being slow? Have you tried using a maintenance cleanup utility? The recommended one to use is OnyX. It's free. Just follow directions.

Do you have enough RAM?
Do you have enough free space on your HDD?

Helps enormously if you actually tell us about your computer. See MYmacROX's signature?

Thank you. AOK

Reinstallde OS. Now everything works.