Mountain Lion Hangs - restart needed

I am starting a new topic on this issue. I looked at a similar issue that was started in July 2012 and it had 26 pages of posts. Does not seem like the issue has been resolved for 10.8.2. I feel like I am back working in OS 9 where computer freezes were a frequent occurance. Never have had this issue with any previous version of OS X.
My computer is an iMac 2009 (3.06 Ghz). This is a computer that was given to me and everything has worked fine until a week an a half ago when I started getting the spinning beach ball and everything would hang. Had to restart the computer everytime.
I am showing below the log from Console after the last hang issue. Maybe someone has some idea as to why this is happening. Hoping for a solution, but maybe 10.8.3 will so these issues. The disturbing part of my issue is that is seems many are having the same issue with no response from Apple.
Here is a brief snipit from Console after the last freeze:
12/28/12 12:58:57.228 PM com.apple.backupd[632]: Deep event scan at path:/ reason:must scan subdirs|new event db|
12/28/12 1:01:57.046 PM com.apple.backupd[632]: Finished scan
12/28/12 1:02:10.760 PM com.apple.backupd[632]: Found 1245 files (19.43 GB) needing backup
12/28/12 1:02:10.945 PM com.apple.backupd[632]: 25.51 GB required (including padding), 250.09 GB available
12/28/12 1:05:18.000 PM kernel[0]: disk0s2: I/O error.
12/28/12 1:07:30.000 PM kernel[0]: disk0s2: I/O error.
12/28/12 1:08:47.000 PM kernel[0]: disk0s2: I/O error.
12/28/12 1:08:47.993 PM com.apple.backupd[632]: Error: (-36) SrcErr:YES Copying /Library/Application Support/TechTool Protection/Master/Directory Backup 2012-12-28-10-41-56 to (null)
12/28/12 1:08:51.128 PM helpd[332]: Could not find access page in directory /Library/Documentation/Help/AirPort.help
12/28/12 1:08:51.128 PM helpd[332]: Could not find access page in directory /Library/Documentation/Help/AirPort.help
12/28/12 1:08:53.518 PM helpd[332]: Could not find access page in directory /Applications/Final Cut Express.app/Contents/Resources/English.lproj/Final Cut Express Help
12/28/12 1:08:53.519 PM helpd[332]: Could not find access page in directory /Applications/Final Cut Express.app/Contents/Resources/English.lproj/Final Cut Express Help
12/28/12 1:08:54.998 PM helpd[332]: Could not find access page in directory /Library/Documentation/Help/AirPort.help
12/28/12 1:08:54.998 PM helpd[332]: Could not find access page in directory /Library/Documentation/Help/AirPort.help
12/28/12 1:09:05.573 PM helpd[332]: CFPropertyListCreateFromXMLData(): Old-style plist parser: missing semicolon in dictionary on line 1. Parsing will be abandoned. Break on _CFPropertyListMissingSemicolon to debug.
12/28/12 1:09:05.574 PM helpd[332]: CFPropertyListCreateFromXMLData(): Old-style plist parser: missing semicolon in dictionary on line 1. Parsing will be abandoned. Break on _CFPropertyListMissingSemicolon to debug.
12/28/12 1:09:49.229 PM WindowServer[103]: handle_will_sleep_auth_and_shield_windows: no lock state data
The freeze issue oftens happens after waking the computer from sleep, but not always. For now I am turning off Time Machine to see it that could be an issue.
Thanks in advance for your help - Sam

S Laundon wrote:
After running Repair Disk and clearing up the errors. The computer is still hanging and I have to force a restart. I have tried to start the computer with the d key (and control d) to access the Apple Hardware Test, but I am not getting it.
Any suggestions? - Sam
Did you iMac com pre-installed with Lion or Mountain Lion?
If not, then you must use the AHT disk that came witht he computer. And, I'm not even sure if some of the early models that came with Lion pre-installed have the hardware tests in ROM.

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Mountain Lion Hangs - restart needed

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